| Internet-Draft | PCE-YANG | December 2024 |
| Dhody, et al. | Expires 21 June 2025 | [Page] |
This document defines a YANG data model for the management of the Path Computation Element communications Protocol (PCEP) for communications between a Path Computation Client (PCC) and a Path Computation Element (PCE), or between two PCEs.¶
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Copyright (c) 2024 IETF Trust and the persons identified as the document authors. All rights reserved.¶
This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License.¶
The Path Computation Element (PCE) defined in [RFC4655] is an entity that is capable of computing a network path or route based on a network graph, and applying computational constraints. A Path Computation Client (PCC) may make requests to a PCE for paths to be computed.¶
PCEP is the communication protocol between a PCC and PCE and is defined in [RFC5440]. PCEP interactions include path computation requests and path computation replies as well as notifications of specific states related to the use of a PCE in the context of Multiprotocol Label Switching (MPLS) and Generalized MPLS (GMPLS) Traffic Engineering (TE). [RFC8231] specifies extensions to PCEP to enable stateful control of MPLS TE LSPs. [RFC8664] and [RFC9603] extend PCEP to support Segment Routing in MPLS and IPv6 respectively.¶
This document defines a YANG 1.1 [RFC7950] data model for the management of PCEP speakers. It is important to establish a common data model for how PCEP speakers are identified, configured, and monitored. The data model includes configuration data and state data.¶
This document contains a specification of the PCEP YANG module, "ietf-pcep" which provides the PCEP [RFC5440] data model. Further, this document also includes the PCEP statistics YANG module "ietf-pcep-stats" which provides statistics, counters and telemetry data.¶
The YANG modules in this document conform to the Network Management Datastore Architecture (NMDA) [RFC8342]. The origin of the data is indicated as per the origin metadata annotation.¶
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here.¶
This document uses the terminology defined in [RFC4655] and [RFC5440]. In particular, it uses the following acronyms.¶
Path Computation Request message (PCReq).¶
Path Computation Reply message (PCRep).¶
Notification message (PCNtf).¶
Error message (PCErr).¶
Request Parameters object (RP).¶
Synchronization Vector object (SVEC).¶
Explicit Route object (ERO).¶
This document also uses the following terms defined in [RFC7420]:¶
PCEP entity: a local PCEP speaker.¶
PCEP peer: to refer to a remote PCEP speaker.¶
PCEP speaker: where it is not necessary to distinguish between local and remote.¶
Further, this document also uses the following terms defined in [RFC8231] :¶
Stateful PCE, Passive Stateful PCE, Active Stateful PCE¶
Delegation, Revocation, Redelegation¶
LSP State Report, Path Computation Report message (PCRpt).¶
LSP State Update, Path Computation Update message (PCUpd).¶
PLSP-ID: a PCEP-specific identifier for the LSP.¶
SRP: Stateful PCE Request Parameters¶
PCE-initiated LSP, Path Computation LSP Initiate Message (PCInitiate).¶
Path Setup Type (PST).¶
Segment Routing (SR).¶
Objective Function (OF).¶
Association.¶
A simplified graphical representation of the data model is used in this document. The meaning of the symbols in these diagrams is defined in [RFC8340].¶
In this document, the names of data nodes and other data model objects are often used without a prefix, as long as it is clear from the context in which YANG module each name is defined. Otherwise, names are prefixed using the standard prefix associated with the corresponding YANG module, as shown in Table 1.¶
| Prefix | YANG module | Reference |
|---|---|---|
| yang | ietf-yang-types | [RFC6991] |
| inet | ietf-inet-types | [RFC6991] |
| te-types | ietf-te-types | [RFC8776] |
| key-chain | ietf-key-chain | [RFC8177] |
| nacm | ietf-netconf-acm | [RFC8341] |
| tlss | ietf-tls-server | [RFC9645] |
| tlsc | ietf-tls-client | [RFC9645] |
| ospf | ietf-ospf | [RFC9129] |
| isis | ietf-isis | [RFC9130] |
Following documents are referenced in the model defined in this document -¶
| Documents | Reference |
|---|---|
| OSPF Protocol Extensions for Path Computation Element (PCE) Discovery | [RFC5088] |
| IS-IS Protocol Extensions for Path Computation Element (PCE) Discovery | [RFC5089] |
| Path Computation Element (PCE) Communication Protocol (PCEP) | [RFC5440] |
| Preserving Topology Confidentiality in Inter-Domain Path Computation Using a Path-Key-Based Mechanism | [RFC5520] |
| Encoding of Objective Functions in the Path Computation Element Communication Protocol (PCEP) | [RFC5541] |
| Path Computation Element Communication Protocol (PCEP) Requirements and Protocol Extensions in Support of Global Concurrent Optimization | [RFC5557] |
| Common YANG Data Types | [RFC6991] |
| YANG Data Model for Key Chains | [RFC8177] |
| Path Computation Element Communication Protocol (PCEP) Extensions for Stateful PCE | [RFC8231] |
| Optimizations of Label Switched Path State Synchronization Procedures for a Stateful PCE | [RFC8232] |
| PCEPS: Usage of TLS to Provide a Secure Transport for the Path Computation Element Communication Protocol (PCEP) | [RFC8253] |
| Path Computation Element Communication Protocol (PCEP) Extensions for PCE-Initiated LSP Setup in a Stateful PCE Model | [RFC8281] |
| Extensions to the Path Computation Element Communication Protocol (PCEP) for Point-to-Multipoint Traffic Engineering Label Switched Paths | [RFC8306] |
| Network Configuration Access Control Model | [RFC8341] |
| Conveying Path Setup Type in PCE Communication Protocol (PCEP) Messages | [RFC8408] |
| Traffic Engineering Common YANG Types | [RFC8776] |
| YANG Groupings for TLS Clients and TLS Servers | [RFC9645] |
| PCEP Extensions for Segment Routing | [RFC8664] |
| PCEP Extensions for Establishing Relationships Between Sets of LSPs | [RFC8697] |
| YANG Data Model for OSPF Protocol | [RFC9129] |
| YANG Data Model for IS-IS Protocol | [RFC9130] |
| PCEP extensions for GMPLS | [RFC8779] |
| ASSOCIATION Type Field in Path Computation Element Protocol (PCEP) Numbers | [IANA-PCEP] |
| Path Computation Element (PCE) Capability Flags in Interior Gateway Protocol (IGP) Parameters | [IANA-IGP] |
| Path Computation Element Communication Protocol (PCEP) Extension for Flow Specification | [RFC9168] |
| Path Computation Element Communication Protocol (PCEP) Extensions for the Hierarchical Path Computation Element (H-PCE) Architecture | [RFC8685] |
| Hierarchical Stateful Path Computation Element (PCE) | [RFC8751] |
| IGP Extension for Path Computation Element Communication Protocol (PCEP) Security Capability Support in PCE Discovery (PCED) | [RFC9353] |
| Stateful Path Computation Element (PCE) Protocol Extensions for Usage with Point-to-Multipoint TE Label Switched Paths (LSPs) | [RFC8623] |
| The TCP Authentication Option | [RFC5925] |
| Path Computation Element Communication Protocol (PCEP) Extensions for Associating Working and Protection Label Switched Paths (LSPs) with Stateful PCE | [RFC8745] |
| Path Computation Element Communication Protocol (PCEP) Extension for Label Switched Path (LSP) Diversity Constraint Signaling | [RFC8800] |
| Path Computation Element Communication Protocol (PCEP) Extensions for Establishing Relationships between Sets of Label Switched Paths and Virtual Networks | [RFC9358] |
| Extensions to the Path Computation Element Communication Protocol (PCEP) for Inter-Layer MPLS and GMPLS Traffic Engineering | [RFC8282] |
| Path Computation Element Communication Protocol (PCEP) Extension for Associating Policies and Label Switched Paths (LSPs) | [RFC9005] |
The PCEP YANG module defined in this document has all the common building blocks for PCEP, which are listed below and further detailed in the subsequent subsections.¶
module: ietf-pcep
+--rw pcep!
+--rw entity
+--rw addr* inet:ip-address-no-zone
+--rw enabled? boolean
+--rw role role
+--rw description? string
+--rw speaker-entity-id? string {sync-opt}?
+--rw admin-status? boolean
+--ro index? uint32
+--ro oper-status? oper-status
+--rw domains
| +--rw domain* [type domain]
| +--...
+--rw capabilities
| +--...
+--rw auth
| +--...
+--rw pce-info
| +--rw scope
| | +--...
| +--rw neighbour-domains
| | +--...
| +--rw path-key {path-key}?
| +--...
+--...
+--ro lsp-db {stateful}?
| +--ro db-ver? uint64 {sync-opt}?
| +--ro association-list*
| | [type id source global-source extended-id]
| | {association}?
| | +--...
| +--ro lsp* [plsp-id pcc-id lsp-id]
| +--...
+--ro path-keys {path-key}?
| +--ro path-key* [key]
| +--...
+--rw peers
+--rw peer* [addr]
+--...
+--ro sessions
+--ro session* [initiator]
+--...
rpcs:
+---x trigger-resync {stateful,sync-opt}?
+---w input
+---w pcc -> /pcep/entity/peers/peer/addr
notifications:
+---n pcep-session-up
| +--...
+---n pcep-session-down
| +--...
+---n pcep-session-local-overload
| +--...
+---n pcep-session-local-overload-clear
| +--...
+---n pcep-session-peer-overload
| +--...
+---n pcep-session-peer-overload-clear
+--...
¶
The PCEP YANG module may contain status information for the local PCEP entity.¶
The entity has an IP address (using ietf-inet-types [RFC6991]) and a "role" leaf (the local entity PCEP role) as mandatory.¶
Note that, the PCEP MIB module [RFC7420] uses an entity list and a system-generated entity index as a primary index to the read-only entity table.¶
The local PCEP entity contains various information related to this entity such as its domain, capabilities, security parameters etc. When the local entity is PCE, it could also have path-key and the LSP-DB information.¶
Note that the timer names in the YANG use hyphens as compared to [RFC5440] (for example, DeadTimer in the protocol specification is called dead-timer in YANG).¶
module: ietf-pcep
+--rw pcep!
+--rw entity
+--rw addr* inet:ip-address-no-zone
+--rw enabled? boolean
+--rw role role
+--rw description? string
+--rw speaker-entity-id? string {sync-opt}?
+--rw admin-status? boolean
+--ro index? uint32
+--ro oper-status? oper-status
+--rw domains
| +--rw domain* [type domain]
| +--rw type identityref
| +--rw domain domain
+--rw capabilities
| +--rw capability? bits
| +--rw pce-initiated? boolean {pce-initiated}?
| +--rw include-db-ver? boolean {stateful,sync-opt}?
| +--rw trigger-resync? boolean {stateful,sync-opt}?
| +--rw trigger-initial-sync? boolean {stateful,sync-opt}?
| +--rw incremental-sync? boolean {stateful,sync-opt}?
| +--rw sr-mpls {sr-mpls}?
| | +--rw enabled? boolean
| | +--rw no-msd-limit? boolean
| | +--rw nai? boolean
| +--rw stateful-gmpls {stateful,gmpls}?
| | +--rw enabled? boolean
| +--rw inter-layer? boolean {inter-layer}?
| +--rw h-pce {h-pce}?
| +--rw enabled? boolean
| +--rw stateful? boolean {stateful}?
| +--rw role? hpce-role
+--ro msd? uint8 {sr-mpls}?
+--rw auth
| +--rw (auth-type-selection)?
| +--:(auth-key-chain)
| | +--rw key-chain?
| | key-chain:key-chain-ref
| +--:(auth-key)
| | +--rw crypto-algorithm identityref
| | +--rw (key-string-style)?
| | +--:(keystring)
| | | +--rw keystring? string
| | +--:(hexadecimal) {key-chain:hex-key-string}?
| | +--rw hexadecimal-string? yang:hex-string
| +--:(auth-tls) {tls}?
| +--rw (role)?
| +--:(server)
| | +--rw tls-server
| | +--rw server-identity
| | | +--rw (auth-type)
| | | ...
| | +--rw client-authentication!
| | | {client-auth-supported}?
| | | +--rw ca-certs! {client-auth-x509-cert}?
| | | | ...
| | | +--rw ee-certs! {client-auth-x509-cert}?
| | | | ...
| | | +--rw raw-public-keys!
| | | | {client-auth-raw-public-key}?
| | | | ...
| | | +--rw tls12-psks? empty
| | | | {client-auth-tls12-psk}?
| | | +--rw tls13-epsks? empty
| | | {client-auth-tls13-epsk}?
| | +--rw hello-params {tlscmn:hello-params}?
| | | +--rw tls-versions
| | | | ...
| | | +--rw cipher-suites
| | | ...
| | +--rw keepalives {tls-server-keepalives}?
| | +--rw peer-allowed-to-send? empty
| | +--rw test-peer-aliveness!
| | ...
| +--:(client)
| +--rw tls-client
| +--rw client-identity!
| | +--rw (auth-type)
| | ...
| +--rw server-authentication
| | +--rw ca-certs! {server-auth-x509-cert}?
| | | ...
| | +--rw ee-certs! {server-auth-x509-cert}?
| | | ...
| | +--rw raw-public-keys!
| | | {server-auth-raw-public-key}?
| | | ...
| | +--rw tls12-psks? empty
| | | {server-auth-tls12-psk}?
| | +--rw tls13-epsks? empty
| | {server-auth-tls13-epsk}?
| +--rw hello-params {tlscmn:hello-params}?
| | +--rw tls-versions
| | | ...
| | +--rw cipher-suites
| | ...
| +--rw keepalives {tls-client-keepalives}?
| +--rw peer-allowed-to-send? empty
| +--rw test-peer-aliveness!
| ...
+--rw pce-info
| +--rw scope
| | +--rw path-scope? bits
| | +--rw intra-area-pref? uint8
| | +--rw inter-area-pref? uint8
| | +--rw inter-as-pref? uint8
| | +--rw inter-layer-pref? uint8
| +--rw neighbour-domains
| | +--rw domain* [type domain]
| | +--rw type identityref
| | +--rw domain domain
| +--rw path-key {path-key}?
| +--rw enabled? boolean
| +--rw discard-timer? uint32
| +--rw reuse-time? uint32
| +--rw pce-id? inet:ip-address-no-zone
+--rw connect-timer? uint16
+--rw connect-max-retry? uint32
+--rw init-back-off-timer uint16
+--rw max-back-off-timer uint32
+--ro open-wait-timer? uint16
+--ro keep-wait-timer? uint16
+--rw keepalive-timer? uint8
+--rw dead-timer? uint8
+--rw allow-negotiation? boolean
+--rw max-keepalive-timer uint8
+--rw max-dead-timer uint8
+--rw min-keepalive-timer uint8
+--rw min-dead-timer uint8
+--rw sync-timer? uint16 {svec}?
+--rw request-timer uint16
+--rw max-sessions uint32
+--rw max-unknown-reqs? uint32
+--rw max-unknown-msgs? uint32
+--rw pcep-notification-max-rate uint32
+--rw stateful-parameter {stateful}?
| +--rw state-timeout uint32
| +--rw redelegation-timeout uint32
| +--rw rpt-non-pcep-lsp? boolean
+--rw of-list {objective-function}?
| +--rw objective-function* [of]
| +--rw of identityref
+--ro lsp-db {stateful}?
| +--ro db-ver? uint64 {sync-opt}?
| +--ro association-list*
| | [type id source global-source extended-id]
| | {association}?
| | +--ro type identityref
| | +--ro id uint16
| | +--ro source inet:ip-address-no-zone
| | +--ro global-source uint32
| | +--ro extended-id string
| | +--ro lsp* [plsp-id pcc-id lsp-id]
| | +--ro plsp-id -> /pcep/entity/lsp-db/lsp/plsp-id
| | +--ro pcc-id leafref
| | +--ro lsp-id leafref
| +--ro lsp* [plsp-id pcc-id lsp-id]
| +--ro plsp-id uint32
| +--ro pcc-id inet:ip-address-no-zone
| +--ro source? inet:ip-address-no-zone
| +--ro destination? inet:ip-address-no-zone
| +--ro tunnel-id? uint16
| +--ro lsp-id uint16
| +--ro extended-tunnel-id? inet:ip-address-no-zone
| +--ro admin-state? boolean
| +--ro operational-state? operational-state
| +--ro delegated
| | +--ro enabled? boolean
| | +--ro peer? -> /pcep/entity/peers/peer/addr
| | +--ro srp-id? uint32
| +--ro initiation {pce-initiated}?
| | +--ro enabled? boolean
| | +--ro peer? -> /pcep/entity/peers/peer/addr
| +--ro symbolic-path-name? string
| +--ro last-error? identityref
| +--ro pst? identityref
| +--ro association-list*
| [type id source global-source extended-id]
| {association}?
| +--ro type
| | -> /pcep/entity/lsp-db/association-list/type
| +--ro id leafref
| +--ro source leafref
| +--ro global-source leafref
| +--ro extended-id leafref
+--ro path-keys {path-key}?
| +--ro path-key* [key]
| +--ro key uint16
| +--ro cps
| | +--ro explicit-route-objects* [index]
| | +--ro index uint32
| +--ro pcc-requester? -> /pcep/entity/peers/peer/addr
| +--ro req-id? uint32
| +--ro retrieved? boolean
| +--ro pcc-retrieved? -> /pcep/entity/peers/peer/addr
| +--ro creation-time? yang:timestamp
| +--ro discard-time? uint32
| +--ro reuse-time? uint32
+--rw peers
+--rw peer* [addr]
+--...
¶
The peer list contains peer(s) that the local PCEP entity knows about. A PCEP speaker is identified by its IP address. If there is a PCEP speaker in the network that uses multiple IP addresses then it looks like multiple distinct peers to the other PCEP speakers in the network.¶
Since PCEP sessions can be ephemeral, the peer list tracks a peer even when no PCEP session currently exists for that peer. The statistics contained are an aggregate of the statistics for all successive sessions with that peer.¶
To limit the quantity of information that is stored, an implementation MAY choose to discard this information if and only if no PCEP session exists for the corresponding peer.¶
The data model for PCEP peers presented in this document uses a flat list of peers. Each peer in the list is identified by its IP address.¶
This peer list includes peers that are explicitly configured at the local PCEP entity as well as peers that are learned dynamically. For example, at a PCC, the remote PCE peer to use could be explicitly configured. A PCC could also learn a PCE address in the network via the IGP discovery and it will show up in this list. When a session is initiated at a PCE, the remote PCC peer information is also added by the system to the peer list.¶
module: ietf-pcep
+--rw pcep!
+--rw entity
+--...
+--rw peers
+--rw peer* [addr]
+--rw addr inet:ip-address-no-zone
+--rw role role
+--rw description? string
+--rw domains
| +--rw domain* [type domain]
| +--rw type identityref
| +--rw domain domain
+--rw capabilities
| +--rw capability? bits
| +--rw pce-initiated? boolean {pce-initiated}?
| +--rw include-db-ver? boolean
| | {stateful,sync-opt}?
| +--rw trigger-resync? boolean
| | {stateful,sync-opt}?
| +--rw trigger-initial-sync? boolean
| | {stateful,sync-opt}?
| +--rw incremental-sync? boolean
| | {stateful,sync-opt}?
| +--rw sr-mpls {sr-mpls}?
| | +--rw enabled? boolean
| | +--rw no-msd-limit? boolean
| | +--rw nai? boolean
| +--rw stateful-gmpls {stateful,gmpls}?
| | +--rw enabled? boolean
| +--rw inter-layer? boolean {inter-layer}?
| +--rw h-pce {h-pce}?
| +--rw enabled? boolean
| +--rw stateful? boolean {stateful}?
| +--rw role? hpce-role
+--ro msd? uint8 {sr-mpls}?
+--rw pce-info
| +--rw scope
| | +--rw path-scope? bits
| | +--rw intra-area-pref? uint8
| | +--rw inter-area-pref? uint8
| | +--rw inter-as-pref? uint8
| | +--rw inter-layer-pref? uint8
| +--rw neighbour-domains
| +--rw domain* [type domain]
| +--rw type identityref
| +--rw domain domain
+--rw delegation-pref uint8 {stateful}?
+--rw auth
| +--rw (auth-type-selection)?
| +--:(auth-key-chain)
| | +--rw key-chain?
| | key-chain:key-chain-ref
| +--:(auth-key)
| | +--rw crypto-algorithm identityref
| | +--rw (key-string-style)?
| | +--:(keystring)
| | | +--rw keystring? string
| | +--:(hexadecimal) {key-chain:hex-key-string}?
| | +--rw hexadecimal-string? yang:hex-string
| +--:(auth-tls) {tls}?
| +--rw (role)?
| +--:(server)
| | +--rw tls-server
| | ...
| +--:(client)
| +--rw tls-client
| ...
+--ro discontinuity-time? yang:timestamp
+--ro initiate-session? boolean
+--ro session-exists? boolean
+--ro session-up-time? yang:timestamp
+--ro session-fail-time? yang:timestamp
+--ro session-fail-up-time? yang:timestamp
+--ro sessions
+--ro session* [initiator]
+--...
¶
The session list contains PCEP sessions that the PCEP entity (PCE or PCC) is currently participating in. The statistics in session are semantically different from those in peer since the former applies to the current session only, whereas the latter is the aggregate for all sessions that have existed to that peer.¶
Although [RFC5440] forbids more than one active PCEP session between a given pair of PCEP entities at any given time, there is a window during the session establishment where two sessions may exist for a given pair, one representing a session initiated by the local PCEP entity and the other representing a session initiated by the peer. When one of these sessions reaches the active state, then the other is discarded.¶
The data model for the PCEP session presented in this document uses a flat list of sessions. Each session in the list is identified by its initiator. This index allows two sessions to exist transiently for a given peer, as discussed above.¶
module: ietf-pcep
+--rw pcep!
+--rw entity
+--...
+--rw peers
+--rw peer* [addr]
+--...
+--ro sessions
+--ro session* [initiator]
+--ro initiator initiator
+--ro role? -> ../../../role
+--ro state-last-change? yang:timestamp
+--ro state? sess-state
+--ro session-creation? yang:timestamp
+--ro connect-retry? yang:counter32
+--ro local-id? uint8
+--ro remote-id? uint8
+--ro keepalive-timer? uint8
+--ro peer-keepalive-timer? uint8
+--ro dead-timer? uint8
+--ro peer-dead-timer? uint8
+--ro ka-hold-time-rem? uint8
+--ro overloaded? boolean
+--ro overloaded-timestamp? yang:timestamp
+--ro overload-time? uint32
+--ro peer-overloaded? boolean
+--ro peer-overloaded-timestamp? yang:timestamp
+--ro peer-overload-time? uint32
+--ro lspdb-sync? sync-state
| {stateful}?
+--ro recv-db-ver? uint64
| {stateful,sync-opt}?
+--ro of-list {objective-function}?
| +--ro objective-function* [of]
| +--ro of identityref
+--ro pst-list
| +--ro path-setup-type* [pst]
| +--ro pst identityref
+--ro assoc-type-list {association}?
| +--ro assoc-type* [at]
| +--ro at identityref
+--ro speaker-entity-id? string
{sync-opt}?
¶
This YANG model defines a list of notifications to inform clients of important events detected during the protocol operation. The notifications defined cover the PCEP MIB [RFC7420] notifications.¶
notifications:
+---n pcep-session-up
| +--ro peer-addr? -> /pcep/entity/peers/peer/addr
| +--ro session-initiator? leafref
| +--ro state-last-change? yang:timestamp
| +--ro state? sess-state
+---n pcep-session-down
| +--ro peer-addr? -> /pcep/entity/peers/peer/addr
| +--ro session-initiator? initiator
| +--ro state-last-change? yang:timestamp
| +--ro state? sess-state
+---n pcep-session-local-overload
| +--ro peer-addr? -> /pcep/entity/peers/peer/addr
| +--ro session-initiator? leafref
| +--ro overloaded? boolean
| +--ro overloaded-timestamp? yang:timestamp
| +--ro overload-time? uint32
+---n pcep-session-local-overload-clear
| +--ro peer-addr?
| | -> /pcep/entity/peers/peer/addr
| +--ro overloaded? boolean
| +--ro overloaded-clear-timestamp? yang:timestamp
+---n pcep-session-peer-overload
| +--ro peer-addr?
| | -> /pcep/entity/peers/peer/addr
| +--ro session-initiator? leafref
| +--ro peer-overloaded? boolean
| +--ro peer-overloaded-timestamp? yang:timestamp
| +--ro peer-overload-time? uint32
+---n pcep-session-peer-overload-clear
+--ro peer-addr?
| -> /pcep/entity/peers/peer/addr
+--ro peer-overloaded? boolean
+--ro peer-overloaded-clear-timestamp? yang:timestamp
¶
This YANG model defines a RPC to trigger state resynchronize at the PCE for sanity check with a particular PCC.¶
rpcs:
+---x trigger-resync {stateful,sync-opt}?
+---w input
+---w pcc -> /pcep/entity/peers/peer/addr
¶
The module, "ietf-pcep-stats", augments the ietf-pcep module to include statistics at the PCEP peer and session level. It includes an RPC to reset statistics.¶
module: ietf-pcep-stats
augment /pcep:pcep/pcep:entity/pcep:peers/pcep:peer:
+--ro sess-setup-ok? yang:counter32
+--ro sess-setup-fail? yang:counter32
+--ro stats
+--ro discontinuity-time? yang:timestamp
+--ro pce
| +--ro rsp-time-avg? uint32
| +--ro rsp-time-lwm? uint32
| +--ro rsp-time-hwm? uint32
| +--ro pcreq-sent? yang:counter32
| +--ro pcreq-rcvd? yang:counter32
| +--ro pcrep-sent? yang:counter32
| +--ro pcrep-rcvd? yang:counter32
| +--ro req-sent? yang:counter32
| +--ro req-sent-pend-rep? yang:counter32
| +--ro req-sent-ero-rcvd? yang:counter32
| +--ro req-sent-nopath-rcvd? yang:counter32
| +--ro req-sent-cancel-rcvd? yang:counter32
| +--ro req-sent-error-rcvd? yang:counter32
| +--ro req-sent-timeout? yang:counter32
| +--ro req-sent-cancel-sent? yang:counter32
| +--ro rep-rcvd-unknown? yang:counter32
+--ro pcerr-sent? yang:counter32
+--ro pcerr-rcvd? yang:counter32
+--ro pcntf-sent? yang:counter32
+--ro pcntf-rcvd? yang:counter32
+--ro keepalive-sent? yang:counter32
+--ro keepalive-rcvd? yang:counter32
+--ro unknown-rcvd? yang:counter32
+--ro corrupt-rcvd? yang:counter32
+--ro pcc
| +--ro req-rcvd? yang:counter32
| +--ro req-rcvd-pend-rep? yang:counter32
| +--ro req-rcvd-ero-sent? yang:counter32
| +--ro req-rcvd-nopath-sent? yang:counter32
| +--ro req-rcvd-cancel-sent? yang:counter32
| +--ro req-rcvd-error-sent? yang:counter32
| +--ro req-rcvd-cancel-rcvd? yang:counter32
| +--ro req-rcvd-unknown? yang:counter32
+--ro svec {pcep:svec}?
| +--ro pce
| | +--ro svec-sent? yang:counter32
| | +--ro svec-req-sent? yang:counter32
| +--ro pcc
| +--ro svec-rcvd? yang:counter32
| +--ro svec-req-rcvd? yang:counter32
+--ro stateful {pcep:stateful}?
| +--ro pce
| | +--ro pcrpt-sent? yang:counter32
| | +--ro pcupd-rcvd? yang:counter32
| | +--ro rpt-sent? yang:counter32
| | +--ro upd-rcvd? yang:counter32
| | +--ro upd-rcvd-unknown? yang:counter32
| | +--ro upd-rcvd-undelegated? yang:counter32
| | +--ro upd-rcvd-error-sent? yang:counter32
| +--ro pcc
| | +--ro pcrpt-rcvd? yang:counter32
| | +--ro pcupd-sent? yang:counter32
| | +--ro rpt-rcvd? yang:counter32
| | +--ro rpt-rcvd-error-sent? yang:counter32
| | +--ro upd-sent? yang:counter32
| +--ro initiation {pcep:pce-initiated}?
| +--ro pcc
| | +--ro pcinitiate-sent? yang:counter32
| | +--ro initiate-sent? yang:counter32
| +--ro pce
| +--ro pcinitiate-rcvd? yang:counter32
| +--ro initiate-rcvd? yang:counter32
| +--ro initiate-rcvd-error-sent? yang:counter32
+--ro path-key {pcep:path-key}?
| +--ro unknown-path-key? yang:counter32
| +--ro exp-path-key? yang:counter32
| +--ro dup-path-key? yang:counter32
| +--ro path-key-no-attempt? yang:counter32
+---x reset-statistics
| +---w input
| | +---w reset-at? yang:date-and-time
| +--ro output
| +--ro reset-finished-at? yang:date-and-time
+--ro req-sent-closed? yang:counter32
+--ro req-rcvd-closed? yang:counter32
augment /pcep:pcep/pcep:entity/pcep:peers/pcep:peer/pcep:sessions
/pcep:session:
+--ro stats
+--ro discontinuity-time? yang:timestamp
+--ro pce
| +--ro rsp-time-avg? uint32
| +--ro rsp-time-lwm? uint32
| +--ro rsp-time-hwm? uint32
| +--ro pcreq-sent? yang:counter32
| +--ro pcreq-rcvd? yang:counter32
| +--ro pcrep-sent? yang:counter32
| +--ro pcrep-rcvd? yang:counter32
| +--ro req-sent? yang:counter32
| +--ro req-sent-pend-rep? yang:counter32
| +--ro req-sent-ero-rcvd? yang:counter32
| +--ro req-sent-nopath-rcvd? yang:counter32
| +--ro req-sent-cancel-rcvd? yang:counter32
| +--ro req-sent-error-rcvd? yang:counter32
| +--ro req-sent-timeout? yang:counter32
| +--ro req-sent-cancel-sent? yang:counter32
| +--ro rep-rcvd-unknown? yang:counter32
+--ro pcerr-sent? yang:counter32
+--ro pcerr-rcvd? yang:counter32
+--ro pcntf-sent? yang:counter32
+--ro pcntf-rcvd? yang:counter32
+--ro keepalive-sent? yang:counter32
+--ro keepalive-rcvd? yang:counter32
+--ro unknown-rcvd? yang:counter32
+--ro corrupt-rcvd? yang:counter32
+--ro pcc
| +--ro req-rcvd? yang:counter32
| +--ro req-rcvd-pend-rep? yang:counter32
| +--ro req-rcvd-ero-sent? yang:counter32
| +--ro req-rcvd-nopath-sent? yang:counter32
| +--ro req-rcvd-cancel-sent? yang:counter32
| +--ro req-rcvd-error-sent? yang:counter32
| +--ro req-rcvd-cancel-rcvd? yang:counter32
| +--ro req-rcvd-unknown? yang:counter32
+--ro svec {pcep:svec}?
| +--ro pce
| | +--ro svec-sent? yang:counter32
| | +--ro svec-req-sent? yang:counter32
| +--ro pcc
| +--ro svec-rcvd? yang:counter32
| +--ro svec-req-rcvd? yang:counter32
+--ro stateful {pcep:stateful}?
| +--ro pce
| | +--ro pcrpt-sent? yang:counter32
| | +--ro pcupd-rcvd? yang:counter32
| | +--ro rpt-sent? yang:counter32
| | +--ro upd-rcvd? yang:counter32
| | +--ro upd-rcvd-unknown? yang:counter32
| | +--ro upd-rcvd-undelegated? yang:counter32
| | +--ro upd-rcvd-error-sent? yang:counter32
| +--ro pcc
| | +--ro pcrpt-rcvd? yang:counter32
| | +--ro pcupd-sent? yang:counter32
| | +--ro rpt-rcvd? yang:counter32
| | +--ro rpt-rcvd-error-sent? yang:counter32
| | +--ro upd-sent? yang:counter32
| +--ro initiation {pcep:pce-initiated}?
| +--ro pcc
| | +--ro pcinitiate-sent? yang:counter32
| | +--ro initiate-sent? yang:counter32
| +--ro pce
| +--ro pcinitiate-rcvd? yang:counter32
| +--ro initiate-rcvd? yang:counter32
| +--ro initiate-rcvd-error-sent? yang:counter32
+--ro path-key {pcep:path-key}?
| +--ro unknown-path-key? yang:counter32
| +--ro exp-path-key? yang:counter32
| +--ro dup-path-key? yang:counter32
| +--ro path-key-no-attempt? yang:counter32
+---x reset-statistics
+---w input
| +---w reset-at? yang:date-and-time
+--ro output
+--ro reset-finished-at? yang:date-and-time
rpcs:
+---x statistics-reset
¶
This document contains a specification of the base PCEP YANG module, "ietf-pcep" which provides the basic PCEP [RFC5440] data model.¶
This document further handles advanced PCE features like -¶
Capability and Scope¶
Domain information (local/neighbour)¶
Path-Key¶
Objective Function (OF)¶
Global Concurrent Optimization (GCO)¶
P2MP¶
GMPLS¶
Inter-Layer¶
Stateful PCE¶
Segment Routing (SR) for MPLS data plane¶
Authentication including PCEPS (TLS)¶
Hierarchical PCE (H-PCE)¶
Segment Routing in the IPv6 data plane is out of the scope of this document. Refer [I-D.ietf-pce-pcep-srv6-yang] for the PCEP-SRv6 YANG module.¶
In the operational datastore of stateful PCE, the list of LSP state are maintained in the LSP-DB. The key is the PLSP-ID, the PCC's IP address, and the LSP-ID.¶
The PCEP data model contains the operational state of LSPs (/pcep/entity/lsp-db/lsp/) with PCEP-specific attributes. The generic TE attributes of the LSP are defined in [I-D.ietf-teas-yang-te]. A reference to the LSP state in the TE model is maintained.¶
[RFC8253] describes the use of TLSv1.2 [RFC5246] or later in PCEP. Further, [I-D.ietf-pce-pceps-tls13] specify how to protect PCEP messages with TLS 1.3 [RFC8446] by disallowing the use of early data (0-RTT) and listing the cipher suites that need to be supported with TLS 1.3.¶
The PCC acting as the TLS client opens the TLS connection and the PCE acting as the TLS server listens for incoming connections as per TLS specifications ([RFC8446] and [RFC5246]). [RFC8253] specifies the StartTLS procedure in PCEP that initiates the TLS connection before exchanging PCEP messages thus the identity verification is completed before the PCEP session is established.¶
Note that a PCEP speaker could act as both a client (PCC) and a server (PCE). The role within the context of a PCEP session is determined by the relationship it has with its peer (the same holds good for TLS as well).¶
The YANG module uses the TLS grouping in [RFC9645]. Note that any TLS version can be configured but [RFC9645] recommends the use of TLS 1.3 only. At the time of publication of this document, TLS 1.2 is still in common use for PCEP and can still be enabled with the feature "tls12" even though it is marked with status as "deprecated".¶
RFC Ed.: In this section, replace all occurrences of 'XXXX' with the actual RFC number and all occurrences of the revision date below with the date of RFC publication (and remove this note).¶
<CODE BEGINS> file "ietf-pcep@2024-12-18.yang"
module ietf-pcep {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-pcep";
prefix pcep;
import ietf-inet-types {
prefix inet;
reference
"RFC 6991: Common YANG Data Types";
}
import ietf-yang-types {
prefix yang;
reference
"RFC 6991: Common YANG Data Types";
}
import ietf-te-types {
prefix te-types;
reference
"RFC 8776: Common YANG Data Types for Traffic Engineering";
}
import ietf-key-chain {
prefix key-chain;
reference
"RFC 8177: YANG Data Model for Key Chains";
}
import ietf-netconf-acm {
prefix nacm;
reference
"RFC 8341: Network Configuration Protocol (NETCONF) Access
Control Model";
}
import ietf-tls-server {
prefix tlss;
reference
"RFC9645: YANG Groupings for TLS Clients and TLS Servers";
}
import ietf-tls-client {
prefix tlsc;
reference
"RFC9645: YANG Groupings for TLS Clients and TLS Servers";
}
import ietf-ospf {
prefix ospf;
reference
"RFC 9129: YANG Data Model for OSPF Protocol";
}
import ietf-isis {
prefix isis;
reference
"RFC 9130: YANG Data Model for IS-IS Protocol";
}
organization
"IETF PCE (Path Computation Element) Working Group";
contact
"WG Web: <https://datatracker.ietf.org/wg/pce/>
WG List: <mailto:pce@ietf.org>
Editor: Dhruv Dhody
<mailto:dhruv.ietf@gmail.com>";
description
"The YANG module defines a generic configuration and
operational model for Path Computation Element
Communication Protocol (PCEP).
Copyright (c) 2024 IETF Trust and the persons identified as
authors of the code. All rights reserved.
Redistribution and use in source and binary forms, with or
without modification, is permitted pursuant to, and subject
to the license terms contained in, the Revised BSD License
set forth in Section 4.c of the IETF Trust's Legal Provisions
Relating to IETF Documents
(https://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; see the
RFC itself for full legal notices.
The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL', 'SHALL
NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED', 'NOT RECOMMENDED',
'MAY', and 'OPTIONAL' in this document are to be interpreted as
described in BCP 14 (RFC 2119) (RFC 8174) when, and only when,
they appear in all capitals, as shown here.";
revision 2024-12-18 {
description
"Initial revision.";
reference
"RFC XXXX: A YANG Data Model for Path Computation
Element Communications Protocol (PCEP)";
}
/*
* Typedefs
*/
typedef role {
type enumeration {
enum unknown {
value 0;
description
"An unknown role";
}
enum pcc {
value 1;
description
"The role of a Path Computation Client";
}
enum pce {
value 2;
description
"The role of Path Computation Element";
}
enum pcc-and-pce {
value 3;
description
"The role of both Path Computation Client and
Path Computation Element";
}
}
description
"The role of a PCEP speaker.
Takes one of the following values
- unknown(0): the role is not known,
- pcc(1): the role is of a Path Computation
Client (PCC),
- pce(2): the role is of a Path Computation
Server (PCE),
- pcc-and-pce(3): the role is of both a PCC and
a PCE.";
reference
"RFC 5440: Path Computation Element (PCE) Communication
Protocol (PCEP)";
}
typedef oper-status {
type enumeration {
enum oper-status-up {
value 1;
description
"The PCEP entity is active";
}
enum oper-status-down {
value 2;
description
"The PCEP entity is inactive";
}
enum oper-status-going-up {
value 3;
description
"The PCEP entity is activating";
}
enum oper-status-going-down {
value 4;
description
"The PCEP entity is deactivating";
}
enum oper-status-failed {
value 5;
description
"The PCEP entity has failed and will recover
when possible.";
}
enum oper-status-failed-perm {
value 6;
description
"The PCEP entity has failed and will not recover
without operator intervention";
}
}
description
"The operational status of the PCEP entity.
Takes one of the following values:
- oper-status-up(1): Active,
- oper-status-down(2): Inactive,
- oper-status-going-up(3): Activating,
- oper-status-going-down(4): Deactivating,
- oper-status-failed(5): Failed,
- oper-status-failed-perm(6): Failed Permanently.";
reference
"RFC 5440: Path Computation Element (PCE) Communication
Protocol (PCEP)";
}
typedef initiator {
type enumeration {
enum local {
value 1;
description
"The local PCEP entity initiated the session";
}
enum remote {
value 2;
description
"The remote PCEP peer initiated the session";
}
}
description
"The initiator of the session, that is, whether the TCP
connection was initiated by the local PCEP entity or
the remote peer.
Takes one of the following values:
- local(1): Initiated locally,
- remote(2): Initiated remotely.";
}
typedef sess-state {
type enumeration {
enum tcp-pending {
value 1;
description
"The TCPPending state of PCEP session.";
}
enum open-wait {
value 2;
description
"The OpenWait state of PCEP session.";
}
enum keep-wait {
value 3;
description
"The KeepWait state of PCEP session.";
}
enum session-up {
value 4;
description
"The SessionUP state of PCEP session.";
}
}
description
"The current state of the session.
The set of possible states excludes the idle state
since entries do not exist in the idle state.
Takes one of the following values:
- tcp-pending(1): PCEP TCPPending state,
- open-wait(2): PCEP OpenWait state,
- keep-wait(3): PCEP KeepWait state,
- session-up(4): PCEP SessionUP state.";
reference
"RFC 5440: Path Computation Element (PCE) Communication
Protocol (PCEP)";
}
typedef domain {
type union {
type ospf:area-id-type;
type isis:area-address;
type inet:as-number;
}
description
"The Domain Information";
}
typedef operational-state {
type enumeration {
enum down {
value 0;
description
"not active.";
}
enum up {
value 1;
description
"signalled.";
}
enum active {
value 2;
description
"up and carrying traffic.";
}
enum going-down {
value 3;
description
"LSP is being torn down, resources are
being released.";
}
enum going-up {
value 4;
description
"LSP is being signalled.";
}
}
description
"The operational status of the LSP";
reference
"RFC 8231: Path Computation Element Communication Protocol
(PCEP) Extensions for Stateful PCE";
}
typedef sync-state {
type enumeration {
enum pending {
value 0;
description
"The state synchronization
has not started.";
}
enum ongoing {
value 1;
description
"The state synchronization
is ongoing.";
}
enum finished {
value 2;
description
"The state synchronization
is finished.";
}
}
description
"The LSP-DB state synchronization operational
status.";
reference
"RFC 8231: Path Computation Element Communication Protocol
(PCEP) Extensions for Stateful PCE";
}
typedef hpce-role {
type enumeration {
enum unknown {
value 0;
description
"An unknown role";
}
enum child {
value 1;
description
"The PCE is acting as child PCE.";
}
enum parent {
value 2;
description
"The PCE is acting as parent PCE.";
}
}
description
"The H-PCE role of the PCE.";
reference
"RFC 8685: Path Computation Element Communication Protocol
(PCEP) Extensions for the Hierarchical Path Computation
Element (H-PCE) Architecture";
}
/*
* Features
*/
feature svec {
description
"Support synchronized path computation.";
reference
"RFC 5440: Path Computation Element (PCE) Communication
Protocol (PCEP)";
}
feature gmpls {
description
"Support GMPLS.";
reference
"RFC 8779: PCEP extensions for GMPLS";
}
feature objective-function {
description
"Support OF as per RFC 5541.";
reference
"RFC 5541: Encoding of Objective Functions in the Path
Computation Element Communication Protocol (PCEP)";
}
feature global-concurrent {
description
"Support Global Concurrent Optimization (GCO) as per RFC
5557.";
reference
"RFC 5557: Path Computation Element Communication Protocol
(PCEP) Requirements and Protocol Extensions in Support of
Global Concurrent Optimization";
}
feature path-key {
description
"Support path-key as per RFC 5520.";
reference
"RFC 5520: Preserving Topology Confidentiality in Inter-
Domain Path Computation Using a Path-Key-Based Mechanism";
}
feature p2mp {
description
"Support Point-to-Multipoint (P2MP) as per RFC 8306.";
reference
"RFC 8306: Extensions to the Path Computation Element
Communication Protocol (PCEP) for Point-to-Multipoint
Traffic Engineering Label Switched Paths";
}
feature stateful {
description
"Support Stateful PCE as per RFC 8231.";
reference
"RFC 8231: Path Computation Element Communication Protocol
(PCEP) Extensions for Stateful PCE";
}
feature sync-opt {
description
"Support Stateful state synchronization optimization
as per RFC 8232";
reference
"RFC 8232: Optimizations of Label Switched Path State
Synchronization Procedures for a Stateful PCE";
}
feature pce-initiated {
description
"Support PCE-Initiated LSP as per
RFC 8281.";
reference
"RFC 8281: Path Computation Element Communication Protocol
(PCEP) Extensions for PCE-Initiated LSP Setup in a Stateful
PCE Model";
}
feature tls {
description
"Support PCEP over TLS as per RFC 8253.";
reference
"RFC 8253: PCEPS: Usage of TLS to Provide a Secure Transport
for the Path Computation Element Communication Protocol
(PCEP)";
}
feature sr-mpls {
description
"Support Segment Routing (SR) for MPLS in PCEP.";
reference
"RFC 8664: Path Computation Element Communication Protocol
(PCEP) Extensions for Segment Routing";
}
feature association {
description
"Support Association in PCEP.";
reference
"RFC 8697: Path Computation Element Communication Protocol
(PCEP) Extensions for Establishing Relationships between
Sets of Label Switched Paths (LSPs)";
}
feature flowspec {
description
"Support Flow Specification in PCEP.";
reference
"RFC 9168: Path Computation Element Communication Protocol
(PCEP) Extension for Flow Specification";
}
feature h-pce {
description
"Support Hierarchical-PCE (H-PCE).";
reference
"RFC 8685: Path Computation Element Communication
Protocol (PCEP) Extensions for the Hierarchical Path
Computation Element (H-PCE) Architecture";
}
feature inter-layer {
description
"Support Inter-layer path computation.";
reference
"RFC 8282: Extensions to the Path Computation
Element Communication Protocol (PCEP) for Inter-
Layer MPLS and GMPLS Traffic Engineering";
}
/*
* Identities
*/
identity domain-type {
description
"Base Domain Type for PCE";
}
identity ospf-area {
base domain-type;
description
"The OSPF area.";
}
identity isis-area {
base domain-type;
description
"The IS-IS area.";
}
identity autonomous-system {
base domain-type;
description
"The Autonomous System (AS).";
}
identity lsp-error {
if-feature "stateful";
description
"Base LSP error";
reference
"RFC 8231: Path Computation Element Communication Protocol
(PCEP) Extensions for Stateful PCE";
}
identity no-error-lsp-error {
if-feature "stateful";
base lsp-error;
description
"No error, LSP is fine.";
reference
"RFC 8231: Path Computation Element Communication Protocol
(PCEP) Extensions for Stateful PCE";
}
identity unknown-lsp-error {
if-feature "stateful";
base lsp-error;
description
"Unknown reason. LSP Error Code value = 1.";
reference
"RFC 8231: Path Computation Element Communication Protocol
(PCEP) Extensions for Stateful PCE";
}
identity limit-lsp-error {
if-feature "stateful";
base lsp-error;
description
"Limit reached for PCE-controlled LSPs. LSP Error Code
value = 2.";
reference
"RFC 8231: Path Computation Element Communication Protocol
(PCEP) Extensions for Stateful PCE";
}
identity pending-lsp-error {
if-feature "stateful";
base lsp-error;
description
"Too many pending LSP update requests. LSP Error Code
value = 3.";
reference
"RFC 8231: Path Computation Element Communication Protocol
(PCEP) Extensions for Stateful PCE";
}
identity unacceptable-lsp-error {
if-feature "stateful";
base lsp-error;
description
"Unacceptable parameters. LSP Error Code value = 4.";
reference
"RFC 8231: Path Computation Element Communication Protocol
(PCEP) Extensions for Stateful PCE";
}
identity internal-lsp-error {
if-feature "stateful";
base lsp-error;
description
"Internal error. LSP Error Code value = 5.";
reference
"RFC 8231: Path Computation Element Communication Protocol
(PCEP) Extensions for Stateful PCE";
}
identity admin-lsp-error {
if-feature "stateful";
base lsp-error;
description
"LSP administratively brought down. LSP Error Code value
= 6.";
reference
"RFC 8231: Path Computation Element Communication Protocol
(PCEP) Extensions for Stateful PCE";
}
identity preempted-lsp-error {
if-feature "stateful";
base lsp-error;
description
"LSP preempted. LSP Error Code value = 7.";
reference
"RFC 8231: Path Computation Element Communication Protocol
(PCEP) Extensions for Stateful PCE";
}
identity rsvp-lsp-error {
if-feature "stateful";
base lsp-error;
description
"RSVP signaling error. LSP Error Code value = 8.";
reference
"RFC 8231: Path Computation Element Communication Protocol
(PCEP) Extensions for Stateful PCE";
}
identity path-protection {
base te-types:association-type;
description
"Path Protection Association";
reference
"RFC 8745: Path Computation Element Communication Protocol
(PCEP) Extensions for Associating Working and Protection
Label Switched Paths (LSPs) with Stateful PCE";
}
identity disjoint {
base te-types:association-type;
description
"Disjoint Association";
reference
"RFC 8800: Path Computation Element Communication Protocol
(PCEP) Extension for Label Switched Path (LSP) Diversity
Constraint Signaling";
}
identity policy {
base te-types:association-type;
description
"Policy Association";
reference
"RFC 9005: Path Computation Element Communication Protocol
(PCEP) Extension for Associating Policies and Label Switched
Paths (LSPs)";
}
identity virtual-network {
base te-types:association-type;
description
"Virtual Network (VN) Association";
reference
"RFC 9358: Path Computation Element Communication Protocol
(PCEP) Extensions for Establishing Relationships between
Sets of Label Switched Paths and Virtual Networks";
}
/*
* Groupings
*/
grouping domain {
description
"This grouping specifies a Domain where the
PCEP speaker has topology visibility.";
leaf type {
type identityref {
base domain-type;
}
description
"The domain type.";
}
leaf domain {
type domain;
description
"The domain Information.";
}
}
grouping domain-info {
description
"This grouping specifies all information which
may be relevant to both PCC and PCE.
This information corresponds to PCE auto-discovery
information.
The scope relates to either a local entity or a peer.";
container domains {
description
"The domain for the local PCEP entity or a peer.";
list domain {
key "type domain";
description
"The domain information.";
uses domain {
description
"The domain for the local PCEP entity or a peer.";
}
}
}
container capabilities {
description
"The PCEP entity or peer capability information.
This may be relevant to PCE selection as well.
This information corresponds to PCE auto-
discovery information.";
reference
"IANA IGP: Path Computation Element (PCE) Capability
Flags in Interior Gateway Protocol (IGP) Parameters
RFC 5088: OSPF Protocol Extensions for Path
Computation Element (PCE) Discovery
RFC 5089: IS-IS Protocol Extensions for Path
Computation Element (PCE) Discovery
RFC 9353: IGP Extension for Path Computation Element
Communication Protocol (PCEP) Security Capability
Support in PCE Discovery (PCED)";
leaf capability {
type bits {
bit gmpls {
if-feature "gmpls";
description
"Path computation with GMPLS link
constraints.";
}
bit bi-dir {
description
"Bidirectional path computation.";
}
bit diverse {
description
"Diverse path computation.";
}
bit load-balance {
description
"Load-balanced path computation.";
}
bit synchronize {
if-feature "svec";
description
"Synchronized paths computation.";
}
bit objective-function {
if-feature "objective-function";
description
"Support for multiple objective functions.";
}
bit add-path-constraint {
description
"Support for additive path constraints (max
hop count, etc.).";
}
bit prioritization {
description
"Support for request prioritization.";
}
bit multi-request {
description
"Support for multiple requests per message.";
}
bit global-concurrent {
if-feature "global-concurrent";
description
"Support for Global Concurrent Optimization
(GCO).";
reference
"RFC 5557: Path Computation Element Communication
Protocol (PCEP) Requirements and Protocol
Extensions in Support of Global Concurrent
Optimization";
}
bit p2mp {
if-feature "p2mp";
description
"Support for P2MP path computation.";
reference
"RFC 8306: Extensions to the Path Computation
Element Communication Protocol (PCEP) for
Point-to-Multipoint Traffic Engineering Label
Switched Paths";
}
bit active {
if-feature "stateful";
description
"Support for active stateful PCE.";
reference
"RFC 8231: Path Computation Element
Communication Protocol (PCEP) Extensions
for Stateful PCE";
}
bit passive {
if-feature "stateful";
description
"Support for passive stateful PCE.";
reference
"RFC 8231: Path Computation Element
Communication Protocol (PCEP) Extensions
for Stateful PCE";
}
bit p2mp-active {
if-feature "stateful";
if-feature "p2mp";
description
"Support for active stateful PCE for P2MP.";
reference
"RFC 8623: Stateful Path Computation Element
(PCE) Protocol Extensions for Usage with
Point-to-Multipoint TE Label Switched Paths
(LSPs)";
}
bit p2mp-passive {
if-feature "stateful";
if-feature "p2mp";
description
"Support for passive stateful PCE for P2MP.";
reference
"RFC 8623: Stateful Path Computation Element
(PCE) Protocol Extensions for Usage with
Point-to-Multipoint TE Label Switched Paths
(LSPs)";
}
bit p2mp-pce-initiated {
if-feature "stateful";
if-feature "pce-initiated";
if-feature "p2mp";
description
"Support for PCE-initiated LSP for P2MP.";
reference
"RFC 8623: Stateful Path Computation Element
(PCE) Protocol Extensions for Usage with
Point-to-Multipoint TE Label Switched Paths
(LSPs)";
}
bit flowspec {
if-feature "flowspec";
description
"Support for Flow specification.";
reference
"RFC 9168: Path Computation Element Communication
Protocol (PCEP) Extension for Flow Specification";
}
bit tcp-ao {
description
"Support for The TCP Authentication Option
(TCP-AO)";
reference
"RFC 5440: Path Computation Element (PCE)
Communication Protocol (PCEP)
RFC 5925: The TCP Authentication Option";
}
bit tls {
if-feature "tls";
description
"Support for TLS";
reference
"RFC 8253: PCEPS: Usage of TLS to Provide a
Secure Transport for the Path Computation
Element Communication Protocol (PCEP)";
}
}
description
"The bits string indicating the capabilities";
reference
"IANA IGP: Path Computation Element (PCE) Capability
Flags in Interior Gateway Protocol (IGP) Parameters
RFC 5088: OSPF Protocol Extensions for Path
Computation Element (PCE) Discovery
RFC 5089: IS-IS Protocol Extensions for Path
Computation Element (PCE) Discovery
RFC 9353: IGP Extension for Path Computation Element
Communication Protocol (PCEP) Security Capability
Support in PCE Discovery (PCED)";
}
leaf pce-initiated {
if-feature "pce-initiated";
type boolean;
default "false";
description
"Set to true if PCE-initiated LSP capability is
enabled.";
reference
"RFC 8281: Path Computation Element Communication
Protocol (PCEP) Extensions for PCE-Initiated LSP
Setup in a Stateful PCE Model";
}
leaf include-db-ver {
if-feature "stateful";
if-feature "sync-opt";
type boolean;
default "true";
description
"Support inclusion of LSP-DB-VERSION
in LSP object";
reference
"RFC 8232: Optimizations of Label Switched Path State
Synchronization Procedures for a Stateful PCE";
}
leaf trigger-resync {
if-feature "stateful";
if-feature "sync-opt";
type boolean;
default "true";
description
"Support PCE-triggered re-synchronization";
reference
"RFC 8232: Optimizations of Label Switched Path State
Synchronization Procedures for a Stateful PCE";
}
leaf trigger-initial-sync {
if-feature "stateful";
if-feature "sync-opt";
type boolean;
default "true";
description
"PCE-triggered initial synchronization";
reference
"RFC 8232: Optimizations of Label Switched Path State
Synchronization Procedures for a Stateful PCE";
}
leaf incremental-sync {
if-feature "stateful";
if-feature "sync-opt";
type boolean;
default "true";
description
"Support incremental (delta) sync";
reference
"RFC 8232: Optimizations of Label Switched Path State
Synchronization Procedures for a Stateful PCE";
}
container sr-mpls {
if-feature "sr-mpls";
description
"If segment routing for MPLS is supported at the local
entity or a peer.";
reference
"RFC 8664: Path Computation Element Communication Protocol
(PCEP) Extensions for Segment Routing";
leaf enabled {
type boolean;
default "false";
description
"Set to true if SR-MPLS is enabled";
}
leaf no-msd-limit {
type boolean;
default "false";
description
"True indicates no limit on MSD, the
leaf msd is ignored";
}
leaf nai {
type boolean;
default "false";
description
"True indicates the capability to resolve Node or
Adjacency Identifier (NAI) to Segment
Identifier (SID)";
}
}
container stateful-gmpls {
if-feature "stateful";
if-feature "gmpls";
description
"If Stateful GMPLS is supported for a local entity
or a peer";
reference
"RFC 8779: Path Computation Element
Communication Protocol (PCEP) Extensions
for Stateful PCE Usage in GMPLS-controlled
Networks";
leaf enabled {
type boolean;
default "false";
description
"Set to true if Stateful GMPLS is enabled";
}
}
leaf inter-layer {
if-feature "inter-layer";
type boolean;
default "false";
description
"If inter-layer path computation is supported for
local entity or a peer";
reference
"RFC 8282: Extensions to the Path Computation
Element Communication Protocol (PCEP) for Inter-
Layer MPLS and GMPLS Traffic Engineering";
}
container h-pce {
if-feature "h-pce";
description
"If Hierarchical PCE (H-PCE) is supported for local
entity or a peer";
reference
"RFC 8685: Path Computation Element Communication
Protocol (PCEP) Extensions for the Hierarchical Path
Computation Element (H-PCE) Architecture";
leaf enabled {
type boolean;
default "false";
description
"Set to true if H-PCE is enabled";
}
leaf stateful {
if-feature "stateful";
type boolean;
default "false";
description
"Set to true if Stateful H-PCE is enabled";
reference
"RFC 8751: Hierarchical Stateful Path Computation
Element (PCE)";
}
leaf role {
when "../../../role = 'pce'"
+ "or "
+ "../../../role = 'pcc-and-pce'" {
description
"These fields are applicable when the role is PCE.";
}
type hpce-role;
description
"The H-PCE role of the PCE.";
}
}
}
leaf msd {
if-feature "sr-mpls";
type uint8;
config false;
description
"Maximum SID Depth for SR-MPLS i.e. the label stack depth
that a PCC is capable of imposing on a packet.";
reference
"RFC 8664: Path Computation Element Communication Protocol
(PCEP) Extensions for Segment Routing";
}
}
grouping pce-info {
description
"This grouping specifies all PCE information
which may be relevant to the PCE selection.
This information corresponds to PCE auto-discovery
information.";
container scope {
description
"This container defines PCE path computation scope
information which may be relevant to PCE selection.
This information corresponds to PCE auto-discovery
information.";
leaf path-scope {
type bits {
bit intra-area-scope {
description
"PCE can compute intra-area paths (L bit).";
}
bit inter-area-scope {
description
"PCE can compute inter-area paths (R bit).";
}
bit inter-area-scope-default {
description
"PCE can act as a default PCE for inter-area
path computation. (Rd bit)";
}
bit inter-as-scope {
description
"PCE can compute inter-AS paths (S bit).";
}
bit inter-as-scope-default {
description
"PCE can act as a default PCE for inter-AS
path computation (Sd bit).";
}
bit inter-layer-scope {
description
"PCE can compute inter-layer paths (Y bit).";
}
}
description
"The field corresponding to the path scope bits";
}
leaf intra-area-pref {
type uint8 {
range "0..7";
}
description
"The PCE's preference for intra-area TE LSP
computation (PrefL field). Where 7 reflects
the highest preference.";
}
leaf inter-area-pref {
type uint8 {
range "0..7";
}
description
"The PCE's preference for inter-area TE LSP
computation (PrefR field). Where 7 reflects
the highest preference.";
}
leaf inter-as-pref {
type uint8 {
range "0..7";
}
description
"The PCE's preference for inter-AS TE LSP
computation (PrefS field). Where 7 reflects
the highest preference.";
}
leaf inter-layer-pref {
type uint8 {
range "0..7";
}
description
"The PCE's preference for inter-layer TE LSP
computation (PrefY field). Where 7 reflects
the highest preference.";
}
reference
"RFC 5088: OSPF Protocol Extensions for Path
Computation Element (PCE) Discovery
RFC 5089: IS-IS Protocol Extensions for Path
Computation Element (PCE) Discovery";
}
container neighbour-domains {
description
"The list of neighbour PCE-Domain
toward which a PCE can compute
paths";
list domain {
key "type domain";
description
"The neighbour domain.";
uses domain {
description
"The PCE neighbour domain.";
}
}
}
}
grouping notification-instance-hdr {
description
"This group describes common instance-specific data
for notifications.";
leaf peer-addr {
type leafref {
path "/pcep/entity/peers/peer/addr";
}
description
"Reference to peer address";
}
}
grouping notification-session-hdr {
description
"This group describes common session instance-specific
data for notifications.";
uses notification-instance-hdr;
leaf session-initiator {
type leafref {
path "/pcep/entity/peers/peer[addr=current()/../peer-addr]/"
+ "sessions/session/initiator";
}
description
"Reference to pcep session initiator leaf";
}
}
grouping of-list {
description
"List of Objective Functions (OF)";
reference
"RFC 5541: Encoding of Objective Functions in the Path
Computation Element Communication Protocol (PCEP)";
list objective-function {
key "of";
description
"The list of authorized OF";
leaf of {
type identityref {
base te-types:objective-function-type;
}
description
"The OF authorized";
}
}
}
grouping auth {
description
"The Authentication options";
container auth {
description
"The Authentication options";
choice auth-type-selection {
description
"Options for expressing authentication
setting.";
case auth-key-chain {
leaf key-chain {
type key-chain:key-chain-ref;
description
"key-chain name.";
}
}
case auth-key {
leaf crypto-algorithm {
type identityref {
base key-chain:crypto-algorithm;
}
mandatory true;
description
"Cryptographic algorithm associated
with key.";
}
choice key-string-style {
description
"Key string styles";
case keystring {
leaf keystring {
nacm:default-deny-all;
type string;
description
"Key string in ASCII format.";
}
}
case hexadecimal {
if-feature "key-chain:hex-key-string";
leaf hexadecimal-string {
nacm:default-deny-all;
type yang:hex-string;
description
"Key in hexadecimal string format. When
compared to ASCII, specification in
hexadecimal affords greater key entropy
with the same number of internal
key-string octets. Additionally, it
discourages usage of well-known words or
numbers.";
}
}
}
}
case auth-tls {
if-feature "tls";
choice role {
description
"The role of the local entity";
case server {
container tls-server {
uses tlss:tls-server-grouping {
description
"Server TLS information.";
}
description
"TLS related information";
}
}
case client {
container tls-client {
uses tlsc:tls-client-grouping {
description
"Client TLS information.";
}
description
"TLS related information";
}
}
}
}
}
}
}
/*
* Configuration data nodes
*/
container pcep {
presence "The PCEP is enabled";
description
"Parameters for list of configured PCEP entities
on the device.";
container entity {
description
"The configured PCEP entity on the device.";
leaf-list addr {
type inet:ip-address-no-zone;
min-elements 1;
ordered-by user;
description
"The local Internet address of this PCEP entity.
If operating as a PCE server, the PCEP entity
listens on this address. If operating as a PCC,
the PCEP entity binds outgoing TCP connections
to this address based on the address family. It is
possible for the PCEP entity to operate both as a
PCC and a PCE Server, in which case it uses this
address both to listen for incoming TCP connections
and to bind outgoing TCP connections.";
}
leaf enabled {
type boolean;
default "true";
description
"The administrative status of this PCEP
Entity; set to true when UP.";
}
leaf role {
type role;
must '(. != "unknown")' {
error-message "The PCEP entity role cannot be unknown";
}
mandatory true;
description
"The role that this entity can play.
Takes one of the following values:
- pcc(1): this PCEP Entity is a PCC,
- pce(2): this PCEP Entity is a PCE,
- pcc-and-pce(3): this PCEP Entity is both
a PCC and a PCE.";
}
leaf description {
type string;
description
"Description of the PCEP entity configured
by the user";
}
leaf speaker-entity-id {
if-feature "sync-opt";
type string;
description
"The Speaker Entity Identifier";
reference
"RFC 8232: Optimizations of Label Switched
Path State Synchronization Procedures for
a Stateful PCE";
}
leaf admin-status {
type boolean;
default "true";
description
"The administrative status of this PCEP Entity.
The value true represents admin status as up.
This is the desired operational status as
currently set by an operator or by default in
the implementation. The value of oper-status
represents the current status of an attempt to
reach this desired status.";
}
leaf index {
type uint32;
config false;
description
"The index of the operational PECP entity";
}
leaf oper-status {
type oper-status;
config false;
description
"The operational status of the PCEP entity.
Takes one of the following values:
- oper-status-up(1): the PCEP entity is active,
- oper-status-down(2): the PCEP entity is inactive,
- oper-status-going-up(3): the PCEP entity is
activating,
- oper-status-going-down(4): the PCEP entity is
deactivating,
- oper-status-failed(5): the PCEP entity has
failed and will recover when possible,
- oper-status-failed-perm(6): the PCEP entity
has failed and will not recover without
operator intervention.";
}
uses domain-info {
description
"Local PCEP entity information";
}
uses auth {
description
"Local authorization and security parameters";
}
container pce-info {
when "../role = 'pce'"
+ "or "
+ "../role = 'pcc-and-pce'" {
description
"These fields are applicable when the role is PCE.";
}
description
"The Local PCE Entity PCE information";
uses pce-info {
description
"Local PCE information";
}
container path-key {
if-feature "path-key";
description
"Path-Key Configuration";
reference
"RFC 5520: Preserving Topology Confidentiality in
Inter-Domain Path Computation Using a Path-Key
-Based Mechanism";
leaf enabled {
type boolean;
default "false";
description
"Enabled or Disabled; set to true when Enabled";
}
leaf discard-timer {
type uint32;
units "minutes";
default "10";
description
"A timer to discard unwanted path-keys";
}
leaf reuse-time {
type uint32 {
range "30..max";
}
units "minutes";
default "30";
description
"A time after which the path-keys could be reused";
}
leaf pce-id {
type inet:ip-address-no-zone;
description
"PCE Address to be used in each Path-Key Subobject
(PKS), same as local PCE entity IP address";
}
}
}
leaf connect-timer {
type uint16 {
range "1..max";
}
units "seconds";
default "60";
description
"The time in seconds that the PCEP entity will wait
to establish a TCP connection with a peer. If a
TCP connection is not established within this time
then PCEP aborts the session setup attempt.";
reference
"RFC 5440: Path Computation Element (PCE) Communication
Protocol (PCEP)";
}
leaf connect-max-retry {
type uint32;
default "5";
description
"The maximum number of times the system tries to
establish a TCP connection to a peer before the
session with the peer transitions to the idle
state.";
reference
"RFC 5440: Path Computation Element (PCE) Communication
Protocol (PCEP)";
}
leaf init-back-off-timer {
type uint16 {
range "1..max";
}
units "seconds";
mandatory true;
description
"The initial back-off time in seconds for retrying
a failed session setup attempt to a peer.
The back-off time increases for each failed
session setup attempt, until a maximum back-off
time is reached. The maximum back-off time is the
max-back-off-timer leaf.";
reference
"RFC 5440: Path Computation Element (PCE) Communication
Protocol (PCEP)";
}
leaf max-back-off-timer {
type uint32;
units "seconds";
mandatory true;
description
"The maximum back-off time in seconds for retrying
a failed session setup attempt to a peer.
The back-off time increases for each failed session
setup attempt, until this maximum value is reached.
Session setup attempts then repeat periodically
without any further increase in back-off time.";
reference
"RFC 5440: Path Computation Element (PCE) Communication
Protocol (PCEP)";
}
leaf open-wait-timer {
type uint16;
units "seconds";
config false;
description
"The time in seconds that the PCEP entity will wait
to receive an Open message from a peer after the
TCP connection has come up.
If no Open message is received within this time then
PCEP terminates the TCP connection and deletes the
associated sessions.";
reference
"RFC 5440: Path Computation Element (PCE) Communication
Protocol (PCEP)";
}
leaf keep-wait-timer {
type uint16;
units "seconds";
config false;
description
"The time in seconds that the PCEP entity will wait
to receive a Keepalive or PCErr message from a peer
during session initialization after receiving an
Open message. If no Keepalive or PCErr message is
received within this time then PCEP terminates the
TCP connection and deletes the associated
sessions.";
reference
"RFC 5440: Path Computation Element (PCE) Communication
Protocol (PCEP)";
}
leaf keepalive-timer {
type uint8;
units "seconds";
default "30";
description
"The Keepalive timer that this PCEP
entity will propose in the initial Open message of
each session it is involved in. This is the
maximum time between two consecutive messages sent
to a peer. Zero means that the PCEP entity prefers
not to send Keepalives at all.
Note that the actual Keepalive transmission
intervals, in either direction of an active PCEP
session, are determined by negotiation between the
peers as specified by RFC 5440, and so may differ
from this configured value.";
reference
"RFC 5440: Path Computation Element (PCE) Communication
Protocol (PCEP)";
}
leaf dead-timer {
type uint8;
units "seconds";
must '(. > ../keepalive-timer)' {
error-message "The DeadTimer must be "
+ "larger than the Keepalive timer";
}
default "120";
description
"The DeadTimer that this PCEP entity will propose
in the initial Open message of each session it is
involved in. This is the time after which a peer
should declare a session down if it does not
receive any PCEP messages. Zero suggests that the
peer does not run a DeadTimer at all.";
reference
"RFC 5440: Path Computation Element (PCE) Communication
Protocol (PCEP)";
}
leaf allow-negotiation {
type boolean;
default "true";
description
"Whether the PCEP entity will permit the negotiation
of session parameters.";
}
leaf max-keepalive-timer {
type uint8;
units "seconds";
mandatory true;
description
"The maximum value that this PCEP entity will
accept from a peer for the interval between
Keepalive transmissions. Zero means that the PCEP
entity will allow no Keepalive transmission at
all.";
}
leaf max-dead-timer {
type uint8;
units "seconds";
mandatory true;
description
"The maximum value in seconds, that this PCEP
entity will accept from a peer for the DeadTimer.
Zero means that the PCEP entity will allow not
running a DeadTimer.";
}
leaf min-keepalive-timer {
type uint8;
units "seconds";
mandatory true;
description
"The minimum value in seconds, that this PCEP
entity will accept for the interval between
Keepalive transmissions. Zero means that the
PCEP entity insists on no Keepalive
transmission at all.";
}
leaf min-dead-timer {
type uint8;
units "seconds";
mandatory true;
description
"The minimum value in seconds, that this PCEP
entity will accept for the DeadTimer. Zero
means that the PCEP entity insists on not
running a DeadTimer.";
}
leaf sync-timer {
if-feature "svec";
type uint16;
units "seconds";
default "60";
description
"The value of SyncTimer in seconds is used in the
case of synchronized path computation request
using the SVEC object. If after the expiration of
the SyncTimer all the path computation requests
have not been received, a protocol error is
triggered and the PCE must cancel the whole set
of path computation requests.
Zero means that the PCEP entity does not use the
SyncTimer.";
reference
"RFC 5440: Path Computation Element (PCE)
Communication Protocol (PCEP)";
}
leaf request-timer {
type uint16 {
range "1..max";
}
units "seconds";
mandatory true;
description
"The maximum time that the PCEP entity will wait
for a response to a PCReq message.";
}
leaf max-sessions {
type uint32;
mandatory true;
description
"Maximum number of sessions involving this PCEP
entity that can exist at any time.";
}
leaf max-unknown-reqs {
type uint32;
default "5";
description
"The maximum number of unrecognized requests and
replies that any session on this PCEP entity is
willing to accept per minute before terminating
the session.
A PCRep message contains an unrecognized reply
if it contains an RP object whose request ID
does not correspond to any in-progress request
sent by this PCEP entity.
A PCReq message contains an unrecognized request
if it contains an RP object whose request ID is
zero.";
reference
"RFC 5440: Path Computation Element (PCE)
Communication Protocol (PCEP)";
}
leaf max-unknown-msgs {
type uint32;
default "5";
description
"The maximum number of unknown messages that any
session on this PCEP entity is willing to accept
per minute before terminating the session.";
reference
"RFC 5440: Path Computation Element (PCE)
Communication Protocol (PCEP)";
}
leaf pcep-notification-max-rate {
type uint32;
mandatory true;
description
"This variable indicates the maximum number of
notifications issued per second. If events
occur more rapidly, the implementation may
simply fail to emit these notifications during
that period, or may queue them until an
appropriate time. A value of 0 means no
notifications are emitted and all should be
discarded (that is, not queued).";
}
container stateful-parameter {
if-feature "stateful";
description
"The configured stateful PCE parameters";
leaf state-timeout {
type uint32;
units "seconds";
mandatory true;
description
"When a PCEP session is terminated, a PCC
waits for this time period before flushing
LSP state associated with that PCEP session
and reverting to operator-defined default
parameters or behaviours. The max value
represents infinity.";
reference
"RFC 8231: Path Computation Element Communication
Protocol (PCEP) Extensions for Stateful PCE";
}
leaf redelegation-timeout {
when "../../role = 'pcc'"
+ "or "
+ "../../role = 'pcc-and-pce'" {
description
"This field is applicable when the role is
PCC";
}
type uint32;
units "seconds";
must '(. < ../state-timeout)' {
error-message "The Redelegation Timeout must be "
+ "less than the State Timeout";
}
mandatory true;
description
"When a PCEP session is terminated, a PCC
waits for this time period before revoking
LSP delegation to a PCE and attempting to
redelegate LSPs associated with the
terminated PCEP session to an alternate
PCE.";
reference
"RFC 8231: Path Computation Element Communication
Protocol (PCEP) Extensions for Stateful PCE";
}
leaf rpt-non-pcep-lsp {
when "../../role = 'pcc'"
+ "or "
+ "../../role = 'pcc-and-pce'" {
description
"This field is applicable when the role is
PCC";
}
type boolean;
default "true";
description
"If set, a PCC reports LSPs that are not
controlled by any PCE (for example, LSPs
that are statically configured at the
PCC). ";
}
reference
"RFC 8231: Path Computation Element Communication Protocol
(PCEP) Extensions for Stateful PCE";
}
container of-list {
when "../role = 'pce'"
+ "or "
+ "../role = 'pcc-and-pce'" {
description
"These fields are applicable when the role is
PCE";
}
if-feature "objective-function";
uses of-list;
description
"The authorized OF-List at PCE for all peers";
}
container lsp-db {
if-feature "stateful";
config false;
description
"The LSP-DB";
leaf db-ver {
when "../../role = 'pcc'"
+ "or "
+ "../../role = 'pcc-and-pce'" {
description
"This field is applicable when the role is
PCC";
}
if-feature "sync-opt";
type uint64;
description
"The LSP State Database Version Number";
}
list association-list {
if-feature "association";
key "type id source global-source extended-id";
description
"List of all PCEP associations";
reference
"RFC 8697: Path Computation Element Communication
Protocol (PCEP) Extensions for Establishing
Relationships between Sets of Label Switched
Paths (LSPs)";
leaf type {
type identityref {
base te-types:association-type;
}
description
"The PCEP Association Type";
reference
"IANA PCEP: ASSOCIATION Type Field in Path
Computation Element Protocol (PCEP) Numbers
RFC 8697: Path Computation Element Communication
Protocol (PCEP) Extensions for Establishing
Relationships between Sets of Label Switched
Paths (LSPs)";
}
leaf id {
type uint16;
description
"PCEP Association ID";
}
leaf source {
type inet:ip-address-no-zone;
description
"PCEP Association Source.";
}
leaf global-source {
type uint32;
description
"PCEP Global Association Source.";
}
leaf extended-id {
type string;
description
"Additional information to support unique
identification (Extended Association ID).";
}
list lsp {
key "plsp-id pcc-id lsp-id";
description
"List of all LSP in this association";
leaf plsp-id {
type leafref {
path "/pcep/entity/lsp-db/"
+ "lsp/plsp-id";
}
description
"Reference to PLSP-ID in LSP-DB";
}
leaf pcc-id {
type leafref {
path "/pcep/entity/lsp-db/"
+ "lsp[plsp-id=current()/"
+ "../plsp-id]/pcc-id";
}
description
"Reference to PCC-ID in LSP-DB";
}
leaf lsp-id {
type leafref {
path "/pcep/entity/lsp-db/"
+ "lsp[plsp-id=current()/../plsp-id]"
+ "[pcc-id=current()/../pcc-id]/lsp-id";
}
description
"Reference to LSP ID in LSP-DB";
}
}
}
list lsp {
key "plsp-id pcc-id lsp-id";
description
"List of all LSPs in LSP-DB";
leaf plsp-id {
type uint32 {
range "1..1048575";
}
description
"A PCEP-specific identifier for the LSP. A PCC
creates a unique PLSP-ID for each LSP that is
constant for the lifetime of a PCEP session.
PLSP-ID is 20 bits with 0 and 0xFFFFF are
reserved";
}
leaf pcc-id {
type inet:ip-address-no-zone;
description
"The local IP address of the PCC, that
generated the PLSP-ID.";
}
leaf source {
type inet:ip-address-no-zone;
description
"Tunnel sender address extracted from
LSP-IDENTIFIERS TLV";
reference
"RFC 8231: Path Computation Element
Communication Protocol (PCEP) Extensions
for Stateful PCE";
}
leaf destination {
type inet:ip-address-no-zone;
description
"Tunnel endpoint address extracted from
LSP-IDENTIFIERS TLV";
reference
"RFC 8231: Path Computation Element
Communication Protocol (PCEP) Extensions
for Stateful PCE";
}
leaf tunnel-id {
type uint16;
description
"Tunnel identifier used in the LSP-IDENTIFIERS
TLV that remains constant over the life
of the tunnel.";
reference
"RFC 8231: Path Computation Element
Communication Protocol (PCEP) Extensions
for Stateful PCE";
}
leaf lsp-id {
type uint16;
description
"Identifier used in the LSP-IDENTIFIERS TLV
that can be changed to allow a sender to share
resources with itself.";
reference
"RFC 8231: Path Computation Element
Communication Protocol (PCEP) Extensions
for Stateful PCE";
}
leaf extended-tunnel-id {
type inet:ip-address-no-zone;
description
"Extended Tunnel ID of the LSP in LSP-IDENTIFIERS
TLV. The all-zeros format is represented as
0.0.0.0 and ::.";
reference
"RFC 8231: Path Computation Element
Communication Protocol (PCEP) Extensions
for Stateful PCE";
}
leaf admin-state {
type boolean;
default "true";
description
"The desired operational state";
}
leaf operational-state {
type operational-state;
description
"The operational status of the LSP";
}
container delegated {
description
"The delegation related parameters";
leaf enabled {
type boolean;
default "false";
description
"LSP is delegated or not; set to true when
delegated";
}
leaf peer {
when '../enabled' {
description
"The LSP must be delegated";
}
type leafref {
path "/pcep/entity/peers/peer/addr";
}
description
"At the PCC, the reference to the PCEP peer to
which LSP is delegated; At the PCE, the
reference to the PCEP peer which delegated this
LSP";
}
leaf srp-id {
type uint32 {
range "1..4294967294";
}
description
"The last SRP-ID-number associated with this
LSP. The value 0x00000000 and 0xFFFFFFFF
are reserved.";
}
}
container initiation {
if-feature "pce-initiated";
description
"The PCE initiation related parameters";
reference
"RFC 8281: Path Computation Element Communication
Protocol (PCEP) Extensions for PCE-Initiated LSP
Setup in a Stateful PCE Model";
leaf enabled {
type boolean;
default "false";
description
"Set to true if this LSP is initiated by a PCE";
}
leaf peer {
when '../enabled' {
description
"The LSP must be PCE-Initiated";
}
type leafref {
path "/pcep/entity/peers/peer/addr";
}
description
"If the role is PCC, this leaf refers to the PCEP
peer (PCE) that initiated this LSP. If the role
is PCE, this leaf refers to the PCEP peer (PCC)
where the LSP is initiated";
}
}
leaf symbolic-path-name {
type string;
description
"The symbolic path name associated with the LSP.";
reference
"RFC 8231: Path Computation Element Communication
Protocol (PCEP) Extensions for Stateful PCE";
}
leaf last-error {
type identityref {
base lsp-error;
}
description
"The last error for the LSP.";
}
leaf pst {
type identityref {
base te-types:path-signaling-type;
}
default "te-types:path-setup-rsvp";
description
"The Path Setup Type (PST). Note that the
te-types model uses the term Path Signaling
Type";
reference
"RFC 8408: Conveying Path Setup Type in PCE
Communication Protocol (PCEP) Messages";
}
list association-list {
if-feature "association";
key "type id source global-source extended-id";
description
"List of all PCEP associations";
leaf type {
type leafref {
path "/pcep/entity/lsp-db/"
+ "association-list/type";
}
description
"PCEP Association Type";
}
leaf id {
type leafref {
path "/pcep/entity/lsp-db/"
+ "association-list[type=current()/"
+ "../type]/id";
}
description
"PCEP Association ID";
}
leaf source {
type leafref {
path "/pcep/entity/lsp-db/"
+ "association-list[type=current()/../type]"
+ "[id=current()/../id]/source";
}
description
"PCEP Association Source.";
}
leaf global-source {
type leafref {
path "/pcep/entity/lsp-db/"
+ "association-list[type=current()/../type]"
+ "[id=current()/../id]"
+ "[source=current()/../source]"
+ "/global-source";
}
description
"PCEP Global Association Source.";
}
leaf extended-id {
type leafref {
path "/pcep/entity/lsp-db/"
+ "association-list[type=current()/../type]"
+ "[id=current()/../id]"
+ "[source=current()/../source]"
+ "[global-source=current()/../global-source]"
+ "/extended-id";
}
description
"Additional information to
support unique identification.";
}
reference
"RFC 8697: Path Computation Element Communication
Protocol (PCEP) Extensions for Establishing
Relationships between Sets of Label Switched
Paths (LSPs)";
}
}
}
container path-keys {
when "../role = 'pce' or ../role = 'pcc-and-pce'" {
description
"These fields are applicable when the role is
PCE";
}
if-feature "path-key";
config false;
description
"The path-keys generated by the PCE";
reference
"RFC 5520: Preserving Topology Confidentiality
in Inter-Domain Path Computation Using a Path-
Key-Based Mechanism";
list path-key {
key "key";
description
"The list of path-keys generated by the PCE";
leaf key {
type uint16;
description
"The identifier, or token used to represent
the Confidential Path Segment (CPS) within
the context of the PCE";
}
container cps {
description
"The Confidential Path Segment (CPS)";
list explicit-route-objects {
key "index";
description
"List of explicit route objects";
leaf index {
type uint32;
description
"ERO subobject index";
}
uses te-types:explicit-route-hop;
}
}
leaf pcc-requester {
type leafref {
path "/pcep/entity/peers/peer/addr";
}
description
"Reference to PCC peer address that
issued the original request that led
to the creation of the path-key.";
}
leaf req-id {
type uint32;
description
"The request ID of the original PCReq.";
}
leaf retrieved {
type boolean;
description
"If path-key has been retrieved yet";
}
leaf pcc-retrieved {
when '../retrieved' {
description
"The Path-key should be retrieved";
}
type leafref {
path "/pcep/entity/peers/peer/addr";
}
description
"Reference to PCC peer address which
retrieved the path-key";
}
leaf creation-time {
type yang:timestamp;
description
"The timestamp value at the time this Path-Key
was created.";
}
leaf discard-time {
type uint32;
units "minutes";
description
"A time after which this path-keys will be
discarded";
}
leaf reuse-time {
type uint32;
units "minutes";
description
"A time after which this path-keys could be
reused";
}
}
}
container peers {
description
"The list of configured peers for the
entity (remote PCE)";
list peer {
key "addr";
description
"The peer configured for the entity.
(remote PCE)";
leaf addr {
type inet:ip-address-no-zone;
description
"The local Internet address of this
PCEP peer.";
}
leaf role {
type role;
must '(. != "pcc-and-pce")' {
error-message
"The PCEP peer cannot be both
PCE and PCC at the same time";
}
mandatory true;
description
"The role of the PCEP Peer.
Takes one of the following values:
- unknown(0): this PCEP peer role is not
known,
- pcc(1): this PCEP peer is a PCC,
- pce(2): this PCEP peer is a PCE,
- pcc-and-pce(3): is not allowed as PCEP
peer cannot be acting as both a PCC and a
PCE at the sametime.";
}
leaf description {
type string;
description
"Description of the PCEP peer
configured by the user";
}
uses domain-info {
description
"PCE Peer information";
}
container pce-info {
uses pce-info {
description
"Using the PCE Peer information grouping";
}
description
"The PCE Peer information";
}
leaf delegation-pref {
if-feature "stateful";
type uint8 {
range "0..7";
}
mandatory true;
description
"The PCE peer delegation preference where
7 reflects the highest preference";
}
uses auth {
description
"The PCE peer authorization and security
parameters";
}
leaf discontinuity-time {
type yang:timestamp;
config false;
description
"The timestamp of the time when the information and
statistics were last reset.";
}
leaf initiate-session {
type boolean;
config false;
description
"Indicates whether the local PCEP entity initiates
sessions to this peer, or wait for the peer to
initiate a session.";
}
leaf session-exists {
type boolean;
config false;
description
"Indicates whether a session with
this peer currently exists.";
}
leaf session-up-time {
type yang:timestamp;
config false;
description
"The timestamp value of the last time a
session with this peer was successfully
established.";
}
leaf session-fail-time {
type yang:timestamp;
config false;
description
"The timestamp value of the last time a
session with this peer failed to be
established.";
}
leaf session-fail-up-time {
type yang:timestamp;
config false;
description
"The timestamp value of the last time a
session with this peer failed from
active.";
}
container sessions {
config false;
description
"This entry represents a single PCEP
session in which the local PCEP entity participates.
This entry exists only if the corresponding PCEP
session has been initialized by some event, such as
manual user configuration, auto-discovery of a peer,
or an incoming TCP connection.";
list session {
key "initiator";
description
"The list of sessions, note that for a time being
two sessions may exist for a peer";
leaf initiator {
type initiator;
description
"The initiator of the session, that is, whether
the TCP connection was initiated by the local
PCEP entity or the peer.
There is a window during session
initialization where two sessions can exist
between a pair of PCEP speakers, each
initiated by one of the speakers. One of
these sessions is always discarded before it
leaves OpenWait state. However, before it is
discarded, two sessions to the given peer
appear transiently in this YANG module. The
sessions are distinguished by who initiated
them, and so this field is the key.";
}
leaf role {
type leafref {
path "../../../role";
}
description
"The peer role.";
}
leaf state-last-change {
type yang:timestamp;
description
"The timestamp value at the time this
session entered its current state as
denoted by the state leaf.";
}
leaf state {
type sess-state;
description
"The current state of the session.
The set of possible states excludes the
idle state since entries do not exist
in the idle state.";
}
leaf session-creation {
type yang:timestamp;
description
"The timestamp value at the time this
session was created.";
}
leaf connect-retry {
type yang:counter32;
description
"The number of times that the local PCEP
entity has attempted to establish a TCP
connection for this session without
success. The PCEP entity gives up when
this reaches connect-max-retry.";
}
leaf local-id {
type uint8;
description
"The value of the PCEP session ID used by
the local PCEP entity in the Open message
for this session. If the state is tcp-pending
then this is the session ID that will be
used in the Open message. Otherwise, this
is the session ID that was sent in the
Open message.";
reference
"RFC 5440: Path Computation Element (PCE)
Communication Protocol (PCEP)";
}
leaf remote-id {
type uint8;
description
"The value of the PCEP session ID used by the
peer in its Open message for this session.
If the state is TCPPending or OpenWait then
this leaf is not used and MUST be set to
zero.";
reference
"RFC 5440: Path Computation Element (PCE)
Communication Protocol (PCEP)";
}
leaf keepalive-timer {
type uint8;
units "seconds";
description
"The agreed maximum interval at which the local
PCEP entity transmits PCEP messages on this PCEP
session. Zero means that the local PCEP entity
never sends Keepalives on this session.
This field is used if and only if the state
is session-up. Otherwise, it is not used and
MUST be set to zero.";
reference
"RFC 5440: Path Computation Element (PCE)
Communication Protocol (PCEP)";
}
leaf peer-keepalive-timer {
type uint8;
units "seconds";
description
"The agreed maximum interval at which the peer
transmits PCEP messages on this PCEP session.
Zero means that the peer never sends Keepalives
on this session.
This field is used if and only if state is
session-up. Otherwise, it is not used and MUST
be set to zero.";
reference
"RFC 5440: Path Computation Element (PCE)
Communication Protocol (PCEP)";
}
leaf dead-timer {
type uint8;
units "seconds";
description
"The DeadTimer interval for this PCEP session.";
reference
"RFC 5440: Path Computation Element (PCE)
Communication Protocol (PCEP)";
}
leaf peer-dead-timer {
type uint8;
units "seconds";
description
"The peer's DeadTimer interval for this PCEP
session.
If the state is TCPPending or OpenWait then
this leaf is not used and MUST be set to zero.";
reference
"RFC 5440: Path Computation Element (PCE)
Communication Protocol (PCEP)";
}
leaf ka-hold-time-rem {
type uint8;
units "seconds";
description
"The Keepalive hold time remaining for this
session.
If the state is TCPPending or OpenWait then
this field is not used and MUST be set to
zero.";
}
leaf overloaded {
type boolean;
description
"If the local PCEP entity has informed the peer
that it is currently overloaded, then this is
set to true. Otherwise, it is set to false.";
reference
"RFC 5440: Path Computation Element (PCE)
Communication Protocol (PCEP)";
}
leaf overloaded-timestamp {
when '../overloaded' {
description
"Valid when overloaded";
}
type yang:timestamp;
description
"The timestamp value of the time when the
overloaded field was set to true.";
}
leaf overload-time {
type uint32;
units "seconds";
description
"The interval of time that is remaining until the
local PCEP entity will cease to be overloaded on
this session.
This field is only used if overloaded is set to
true. Otherwise, it is not used and MUST be set
to zero.";
reference
"RFC 5440: Path Computation Element (PCE)
Communication Protocol (PCEP)";
}
leaf peer-overloaded {
type boolean;
description
"If the peer has informed the local PCEP entity
that it is currently overloaded, then this is
set to true. Otherwise, it is set to false.";
reference
"RFC 5440: Path Computation Element (PCE)
Communication Protocol (PCEP)";
}
leaf peer-overloaded-timestamp {
when '../peer-overloaded' {
description
"Valid when Peer is overloaded";
}
type yang:timestamp;
description
"The timestamp value of the time when the
peer-overloaded field was set to true.";
}
leaf peer-overload-time {
type uint32;
units "seconds";
description
"The interval of time that is remaining until
the peer will cease to be overloaded. If it
is not known how long the peer will stay in
overloaded state, this leaf is set to zero.
This field is only used if peer-overloaded
is set to true. Otherwise, it is not used
and MUST be set to zero.";
reference
"RFC 5440: Path Computation Element (PCE)
Communication Protocol (PCEP)";
}
leaf lspdb-sync {
if-feature "stateful";
type sync-state;
description
"The LSP-DB state synchronization status.";
reference
"RFC 8231: Path Computation Element Communication
Protocol (PCEP) Extensions for Stateful PCE";
}
leaf recv-db-ver {
when "../role = 'pcc'"
+ "or "
+ "../role = 'pcc-and-pce'" {
description
"This field is applicable when the role is
PCC";
}
if-feature "stateful";
if-feature "sync-opt";
type uint64;
description
"The last received LSP State Database Version
Number";
reference
"RFC 8231: Path Computation Element Communication
Protocol (PCEP) Extensions for Stateful PCE";
}
container of-list {
when "../role = 'pce'"
+ "or "
+ "../role = 'pcc-and-pce'" {
description
"These fields are applicable when the role is
PCE";
}
if-feature "objective-function";
uses of-list;
description
"Indicate the list of supported OF on this
session";
reference
"RFC 5541: Encoding of Objective Functions in
the Path Computation Element Communication
Protocol (PCEP)";
}
container pst-list {
when "../role = 'pce'"
+ "or "
+ "../role = 'pcc-and-pce'" {
description
"These fields are applicable when the role is
PCE";
}
description
"Indicate the list of supported
PST on this session";
reference
"RFC 8408: Conveying Path Setup Type in PCE
Communication Protocol (PCEP) Messages";
list path-setup-type {
key "pst";
description
"The list of PST";
leaf pst {
type identityref {
base te-types:path-signaling-type;
}
description
"The PST supported";
}
}
}
container assoc-type-list {
if-feature "association";
description
"Indicate the list of supported association types
on this session";
reference
"RFC 8697: Path Computation Element Communication
Protocol (PCEP) Extensions for Establishing
Relationships between Sets of Label Switched
Paths (LSPs)";
list assoc-type {
key "at";
description
"The list of authorized association types";
leaf at {
type identityref {
base te-types:association-type;
}
description
"The association type authorized";
}
}
}
leaf speaker-entity-id {
if-feature "sync-opt";
type string;
description
"The Speaker Entity Identifier";
reference
"RFC 8232: Optimizations of Label Switched
Path State Synchronization Procedures for
a Stateful PCE";
}
}
}
}
}
}
}
/*
* Notifications
*/
notification pcep-session-up {
description
"This notification is sent when the value of
'/pcep/peers/peer/sessions/session/state'
enters the 'session-up' state.";
uses notification-session-hdr;
leaf state-last-change {
type yang:timestamp;
description
"The timestamp value at the time this session
entered its current state as denoted by the state
leaf.";
}
leaf state {
type sess-state;
description
"The current state of the session.
The set of possible states excludes the idle state
since entries do not exist in the idle state.";
}
reference
"RFC 5440: Path Computation Element (PCE) Communication
Protocol (PCEP)";
}
notification pcep-session-down {
description
"This notification is sent when the value of
'/pcep/peers/peer/sessions/session/state'
leaves the 'session-up' state.";
uses notification-instance-hdr;
leaf session-initiator {
type initiator;
description
"The initiator of the session.";
}
leaf state-last-change {
type yang:timestamp;
description
"The timestamp value at the time this session
entered its current state as denoted by the state
leaf.";
}
leaf state {
type sess-state;
description
"The current state of the session.
The set of possible states excludes the idle state
since entries do not exist in the idle state.";
}
reference
"RFC 5440: Path Computation Element (PCE) Communication
Protocol (PCEP)";
}
notification pcep-session-local-overload {
description
"This notification is sent when the local PCEP entity
enters overload state for a peer.";
uses notification-session-hdr;
leaf overloaded {
type boolean;
description
"If the local PCEP entity has informed the peer
that it is currently overloaded, then this is set
to true. Otherwise, it is set to false.";
}
leaf overloaded-timestamp {
type yang:timestamp;
description
"The timestamp value of the time when the
overloaded field was set to true.";
}
leaf overload-time {
type uint32;
units "seconds";
description
"The interval of time that is remaining until the
local PCEP entity will cease to be overloaded on
this session.";
}
reference
"RFC 5440: Path Computation Element (PCE) Communication
Protocol (PCEP)";
}
notification pcep-session-local-overload-clear {
description
"This notification is sent when the local PCEP entity
leaves overload state for a peer.";
uses notification-instance-hdr;
leaf overloaded {
type boolean;
description
"If the local PCEP entity has informed the peer
that it is currently overloaded, then this is set
to true. Otherwise, it is set to false.";
}
leaf overloaded-clear-timestamp {
type yang:timestamp;
description
"The timestamp value of the time when the
overloaded field was set to false.";
}
reference
"RFC 5440: Path Computation Element (PCE) Communication
Protocol (PCEP)";
}
notification pcep-session-peer-overload {
description
"This notification is sent when a peer enters overload
state.";
uses notification-session-hdr;
leaf peer-overloaded {
type boolean;
description
"If the peer has informed the local PCEP entity that
it is currently overloaded, then this is set to
true. Otherwise, it is set to false.";
}
leaf peer-overloaded-timestamp {
type yang:timestamp;
description
"The timestamp value of the time when the
peer-overloaded field was set to true.";
}
leaf peer-overload-time {
type uint32;
units "seconds";
description
"The interval of time that is remaining until the
peer will cease to be overloaded. If it is not
known how long the peer will stay in overloaded
state, this leaf is set to zero.";
}
reference
"RFC 5440: Path Computation Element (PCE) Communication
Protocol (PCEP)";
}
notification pcep-session-peer-overload-clear {
description
"This notification is sent when a peer leaves overload
state.";
uses notification-instance-hdr;
leaf peer-overloaded {
type boolean;
description
"If the peer has informed the local PCEP entity that
it is currently overloaded, then this is set to
true. Otherwise, it is set to false.";
}
leaf peer-overloaded-clear-timestamp {
type yang:timestamp;
description
"The timestamp value of the time when the
peer-overloaded field was set to false.";
}
reference
"RFC 5440: Path Computation Element (PCE) Communication
Protocol (PCEP)";
}
/*
* RPC
*/
rpc trigger-resync {
if-feature "stateful";
if-feature "sync-opt";
nacm:default-deny-all;
description
"Trigger the resynchronization at the PCE";
reference
"RFC 8232: Optimizations of Label Switched Path State
Synchronization Procedures for a Stateful PCE";
input {
leaf pcc {
type leafref {
path "/pcep/entity/peers/peer/addr";
}
mandatory true;
description
"The IP address to identify the PCC. The state
syncronization is re-triggered for all LSPs from
the PCC. The rpc on the PCC will be ignored.";
}
}
}
}
<CODE ENDS>¶
<CODE BEGINS> file "ietf-pcep-stats@2024-12-18.yang"
module ietf-pcep-stats {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-pcep-stats";
prefix pcep-stats;
import ietf-pcep {
prefix pcep;
reference
"RFC XXXX: A YANG Data Model for Path Computation
Element Communications Protocol (PCEP)";
}
import ietf-yang-types {
prefix yang;
reference
"RFC 6991: Common YANG Data Types";
}
organization
"IETF PCE (Path Computation Element) Working Group";
contact
"WG Web: <https://datatracker.ietf.org/wg/pce/>
WG List: <mailto:pce@ietf.org>
Editor: Dhruv Dhody
<mailto:dhruv.ietf@gmail.com>";
description
"The YANG module augments the Path Computation Element
Communication Protocol (PCEP) YANG operational
model with statistics, counters and telemetry data.
Copyright (c) 2024 IETF Trust and the persons identified as
authors of the code. All rights reserved.
Redistribution and use in source and binary forms, with or
without modification, is permitted pursuant to, and subject
to the license terms contained in, the Revised BSD License
set forth in Section 4.c of the IETF Trust's Legal Provisions
Relating to IETF Documents
(https://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; see the
RFC itself for full legal notices.";
revision 2024-12-18 {
description
"Initial revision.";
reference
"RFC XXXX: A YANG Data Model for Path Computation
Element Communications Protocol (PCEP)";
}
/*
* Groupings
*/
grouping stats {
description
"This grouping defines statistics for PCEP. It is used
for both peer and current sessions. Since this groupings
include a relative path, care needs to be taken while
using it";
leaf discontinuity-time {
type yang:timestamp;
description
"The timestamp value of the time when the
statistics were last reset.";
}
container pce {
when "../../pcep:role = 'pce'"
+ "or "
+ "../../pcep:role = 'pcc-and-pce'" {
description
"Valid for PCEP Peer as PCE";
}
leaf rsp-time-avg {
type uint32;
units "milliseconds";
description
"The average response time. If an average response time
has not been calculated then this leaf has the value
zero.";
}
leaf rsp-time-lwm {
type uint32;
units "milliseconds";
description
"The smallest (low-water mark) response time seen.
If no responses have been received then this leaf has
the value zero.";
}
leaf rsp-time-hwm {
type uint32;
units "milliseconds";
description
"The greatest (high-water mark) response time seen.
If no responses have been received then this object
has the value zero.";
}
leaf pcreq-sent {
type yang:counter32;
description
"The number of PCReq messages sent.";
}
leaf pcreq-rcvd {
type yang:counter32;
description
"The number of PCReq messages received.";
}
leaf pcrep-sent {
type yang:counter32;
description
"The number of PCRep messages sent.";
}
leaf pcrep-rcvd {
type yang:counter32;
description
"The number of PCRep messages received.";
}
leaf req-sent {
type yang:counter32;
description
"The number of requests sent. A request corresponds
1:1 with an RP object in a PCReq message. This might
be greater than pcreq-sent because multiple
requests can be batched into a single PCReq
message.";
}
leaf req-sent-pend-rep {
type yang:counter32;
description
"The number of requests that have been sent for
which a response is still pending.";
}
leaf req-sent-ero-rcvd {
type yang:counter32;
description
"The number of requests that have been sent for
which a response with an ERO object was received.
Such responses indicate that a path was
successfully computed by the peer.";
}
leaf req-sent-nopath-rcvd {
type yang:counter32;
description
"The number of requests that have been sent for
which a response with a NO-PATH object was
received. Such responses indicate that the peer
could not find a path to satisfy the
request.";
}
leaf req-sent-cancel-rcvd {
type yang:counter32;
description
"The number of requests that were cancelled with
a PCNtf message. This might be different than
pcntf-rcvd because not all PCNtf messages are
used to cancel requests, and a single PCNtf message
can cancel multiple requests.";
}
leaf req-sent-error-rcvd {
type yang:counter32;
description
"The number of requests that were rejected with a
PCErr message. This might be different than
pcerr-rcvd because not all PCErr messages are
used to reject requests, and a single PCErr message
can reject multiple requests.";
}
leaf req-sent-timeout {
type yang:counter32;
description
"The number of requests that have been sent to a peer
and have been abandoned because the peer has taken too
long to respond to them.";
}
leaf req-sent-cancel-sent {
type yang:counter32;
description
"The number of requests that were sent to the peer and
explicitly cancelled by the local PCEP entity sending
a PCNtf.";
}
leaf rep-rcvd-unknown {
type yang:counter32;
description
"The number of responses to unknown requests
received. A response to an unknown request is a
response whose RP object does not contain the
request ID of any request that is currently
outstanding on the session.";
}
description
"The stats related to PCE as peer";
}
leaf pcerr-sent {
type yang:counter32;
description
"The number of PCErr messages sent.";
}
leaf pcerr-rcvd {
type yang:counter32;
description
"The number of PCErr messages received.";
}
leaf pcntf-sent {
type yang:counter32;
description
"The number of PCNtf messages sent.";
}
leaf pcntf-rcvd {
type yang:counter32;
description
"The number of PCNtf messages received.";
}
leaf keepalive-sent {
type yang:counter32;
description
"The number of Keepalive messages sent.";
}
leaf keepalive-rcvd {
type yang:counter32;
description
"The number of Keepalive messages received.";
}
leaf unknown-rcvd {
type yang:counter32;
description
"The number of unknown messages received.";
}
leaf corrupt-rcvd {
type yang:counter32;
description
"The number of corrupted PCEP messages received.";
}
container pcc {
when "../../pcep:role = 'pcc'"
+ "or "
+ "../../pcep:role = 'pcc-and-pce'" {
description
"Valid for PCEP Peer as PCC";
}
leaf req-rcvd {
type yang:counter32;
description
"The number of requests received. A request
corresponds 1:1 with an RP object in a PCReq
message.
This might be greater than pcreq-rcvd because
multiple requests can be batched into a single
PCReq message.";
}
leaf req-rcvd-pend-rep {
type yang:counter32;
description
"The number of requests that have been received for
which a response is still pending.";
}
leaf req-rcvd-ero-sent {
type yang:counter32;
description
"The number of requests that have been received for
which a response with an ERO object was sent. Such
responses indicate that a path was successfully
computed by the local PCEP entity.";
}
leaf req-rcvd-nopath-sent {
type yang:counter32;
description
"The number of requests that have been received for
which a response with a NO-PATH object was sent. Such
responses indicate that the local PCEP entity could
not find a path to satisfy the request.";
}
leaf req-rcvd-cancel-sent {
type yang:counter32;
description
"The number of requests received that were cancelled
by the local PCEP entity sending a PCNtf message.
This might be different than pcntf-sent because
not all PCNtf messages are used to cancel requests,
and a single PCNtf message can cancel multiple
requests.";
}
leaf req-rcvd-error-sent {
type yang:counter32;
description
"The number of requests received that were cancelled
by the local PCEP entity sending a PCErr message.
This might be different than pcerr-sent because
not all PCErr messages are used to cancel requests,
and a single PCErr message can cancel multiple
requests.";
}
leaf req-rcvd-cancel-rcvd {
type yang:counter32;
description
"The number of requests that were received from the
peer and explicitly cancelled by the peer sending
a PCNtf.";
}
leaf req-rcvd-unknown {
type yang:counter32;
description
"The number of unknown requests that have been
received. An unknown request is a request
whose RP object contains a request ID of zero.";
}
description
"The stats related to PCC as peer";
}
container svec {
if-feature "pcep:svec";
description
"If synchronized path computation is supported";
container pce {
when "../../../pcep:role = 'pce'"
+ "or "
+ "../../../pcep:role = 'pcc-and-pce'" {
description
"Valid for PCEP Peer as PCE";
}
leaf svec-sent {
type yang:counter32;
description
"The number of SVEC objects sent in PCReq messages.
An SVEC object represents a set of synchronized
requests.";
}
leaf svec-req-sent {
type yang:counter32;
description
"The number of requests sent that appeared in one
or more SVEC objects.";
}
description
"The SVEC stats related to PCE";
}
container pcc {
when "../../../pcep:role = 'pcc'"
+ "or "
+ "../../../pcep:role = 'pcc-and-pce'" {
description
"Valid for PCEP Peer as PCC";
}
leaf svec-rcvd {
type yang:counter32;
description
"The number of SVEC objects received in PCReq
messages. An SVEC object represents a set of
synchronized requests.";
}
leaf svec-req-rcvd {
type yang:counter32;
description
"The number of requests received that appeared
in one or more SVEC objects.";
}
description
"The SVEC stats related to PCC as peer";
}
}
container stateful {
if-feature "pcep:stateful";
description
"Stateful PCE related statistics";
container pce {
when "../../../pcep:role = 'pce'"
+ "or "
+ "../../../pcep:role = 'pcc-and-pce'" {
description
"Valid for PCEP Peer as PCE";
}
leaf pcrpt-sent {
type yang:counter32;
description
"The number of PCRpt messages sent.";
}
leaf pcupd-rcvd {
type yang:counter32;
description
"The number of PCUpd messages received.";
}
leaf rpt-sent {
type yang:counter32;
description
"The number of LSP Reports sent. An LSP report
corresponds 1:1 with an LSP object in a PCRpt
message. This might be greater than
pcrpt-sent because multiple reports can
be batched into a single PCRpt message.";
}
leaf upd-rcvd {
type yang:counter32;
description
"The number of LSP Updates received. An LSP update
corresponds 1:1 with an LSP object in a PCUpd
message.
This might be greater than pcupd-rcvd because
multiple updates can be batched into a single
PCUpd message.";
}
leaf upd-rcvd-unknown {
type yang:counter32;
description
"The number of updates to unknown LSPs
received. An update to an unknown LSP is a
update whose LSP object does not contain the
PLSP-ID of any LSP that is currently
present.";
}
leaf upd-rcvd-undelegated {
type yang:counter32;
description
"The number of updates to not delegated LSPs
received. An update to an undelegated LSP is a
update whose LSP object does not contain the
PLSP-ID of any LSP that is currently
delegated to the current PCEP session.";
}
leaf upd-rcvd-error-sent {
type yang:counter32;
description
"The number of updates to LSPs received that were
responded by the local PCEP entity by sending a
PCErr message.";
}
description
"The stateful stats related to PCE as peer";
}
container pcc {
when "../../../pcep:role = 'pcc'"
+ "or "
+ "../../../pcep:role = 'pcc-and-pce'" {
description
"Valid for PCEP Peer as PCC";
}
leaf pcrpt-rcvd {
type yang:counter32;
description
"The number of PCRpt messages received.";
}
leaf pcupd-sent {
type yang:counter32;
description
"The number of PCUpd messages sent.";
}
leaf rpt-rcvd {
type yang:counter32;
description
"The number of LSP Reports received. An LSP report
corresponds 1:1 with an LSP object in a PCRpt
message.
This might be greater than pcrpt-rcvd because
multiple reports can be batched into a single
PCRpt message.";
}
leaf rpt-rcvd-error-sent {
type yang:counter32;
description
"The number of reports of LSPs received that were
responded by the local PCEP entity by sending a
PCErr message.";
}
leaf upd-sent {
type yang:counter32;
description
"The number of LSP updates sent. An LSP update
corresponds 1:1 with an LSP object in a PCUpd
message. This might be greater than
pcupd-sent because multiple updates can
be batched into a single PCUpd message.";
}
description
"The stateful stats related to PCC as peer";
}
container initiation {
if-feature "pcep:pce-initiated";
description
"PCE-Initiated related statistics";
container pcc {
when "../../../../pcep:role = 'pcc'"
+ "or "
+ "../../../../pcep:role = 'pcc-and-pce'" {
description
"Valid for PCEP Peer as PCC";
}
leaf pcinitiate-sent {
type yang:counter32;
description
"The number of PCInitiate messages sent.";
}
leaf initiate-sent {
type yang:counter32;
description
"The number of LSP Initiation sent via PCE.
An LSP initiation corresponds 1:1 with an LSP
object in a PCInitiate message. This might be
greater than pcinitiate-sent because
multiple initiations can be batched into a
single PCInitiate message.";
}
description
"The initiation stats related to PCC as peer";
}
container pce {
when "../../../../pcep:role = 'pce'"
+ "or "
+ "../../../../pcep:role = 'pcc-and-pce'" {
description
"Valid for PCEP Peer as PCE";
}
leaf pcinitiate-rcvd {
type yang:counter32;
description
"The number of PCInitiate messages received.";
}
leaf initiate-rcvd {
type yang:counter32;
description
"The number of LSP Initiation received from
PCE. An LSP initiation corresponds 1:1 with
an LSP object in a PCInitiate message. This
might be greater than pcinitiate-rcvd
because multiple initiations can be batched
into a single PCInitiate message.";
}
leaf initiate-rcvd-error-sent {
type yang:counter32;
description
"The number of initiations of LSPs received
that were responded to by the local PCEP entity
by sending a PCErr message.";
}
description
"The initiation stats related to PCE as peer";
}
}
}
container path-key {
when "../../pcep:role = 'pcc'"
+ "or "
+ "../../pcep:role = 'pcc-and-pce'" {
description
"Valid for PCEP Peer as PCC";
}
if-feature "pcep:path-key";
description
"If Path-Key is supported";
leaf unknown-path-key {
type yang:counter32;
description
"The number of attempts to expand an unknown
path-key.";
}
leaf exp-path-key {
type yang:counter32;
description
"The number of attempts to expand an expired
path-key.";
}
leaf dup-path-key {
type yang:counter32;
description
"The number of duplicate attempts to expand the same
path-key.";
}
leaf path-key-no-attempt {
type yang:counter32;
description
"The number of expired path-keys with no attempt to
expand it.";
}
}
action reset-statistics {
description
"The reset action will clear the statistics at the
associated container";
input {
leaf reset-at {
type yang:date-and-time;
description
"The time when the reset was issued.";
}
}
output {
leaf reset-finished-at {
type yang:date-and-time;
description
"The time when the reset finished.";
}
}
}
}
/*
* Augment modules to add statistics
*/
augment "/pcep:pcep/pcep:entity/pcep:peers/pcep:peer" {
description
"Augmenting the statistics";
leaf sess-setup-ok {
type yang:counter32;
config false;
description
"The number of PCEP sessions successfully established with
the peer, including any current session. This counter is
incremented each time a session with this peer is
successfully established.";
}
leaf sess-setup-fail {
type yang:counter32;
config false;
description
"The number of PCEP sessions with the peer
that have been attempted but failed
before being fully established. This
counter is incremented each time a
session retry to this peer fails.";
}
container stats {
config false;
description
"The container for all statistics at peer level.";
uses stats {
description
"Since PCEP sessions can be ephemeral, the peer statistics
tracks a peer even when no PCEP session currently exists
to that peer. The statistics contained are an aggregate of
the statistics for all successive sessions to that peer.";
}
leaf req-sent-closed {
when "../../pcep:role = 'pce'"
+ "or "
+ "../../pcep:role = 'pcc-and-pce'" {
description
"Valid for PCEP Peer as PCE";
}
type yang:counter32;
description
"The number of requests that were sent to the peer and
implicitly cancelled when the session they were sent
over was closed.";
}
leaf req-rcvd-closed {
when "../../pcep:role = 'pcc'"
+ "or "
+ "../../pcep:role = 'pcc-and-pce'" {
description
"Valid for PCEP Peer as PCC";
}
type yang:counter32;
description
"The number of requests that were received from the peer
and implicitly cancelled when the session they were
received over was closed.";
}
}
}
augment "/pcep:pcep/pcep:entity/pcep:peers/pcep:peer/"
+ "pcep:sessions/pcep:session" {
description
"Augmenting the statistics";
container stats {
description
"The container for all statistics at session level.";
uses stats {
description
"The statistics contained are for the current sessions to
that peer. These are lost when the session goes down.";
}
}
}
rpc statistics-reset {
description
"Reset all the statistics collected.";
}
}
<CODE ENDS>¶
The ietf-pcep and ietf-pcep-stats YANG modules define data models that are designed to be accessed via YANG-based management protocols, such as NETCONF [RFC6241] and RESTCONF [RFC8040]. These protocols have to use a secure transport layer (e.g., SSH [RFC6242], TLS [RFC8446], and QUIC [RFC9000]) and have to use mutual authentication.¶
The NETCONF access control model [RFC8341] provides the means to restrict access for particular NETCONF or RESTCONF users to a pre-configured subset of all available NETCONF or RESTCONF protocol operations and content.¶
There are a number of data nodes defined in the ietf-pcep YANG module which are writable/creatable/deletable (i.e., config true, which is the default). All writable data nodes are likely to be reasonably sensitive or vulnerable in some network environments. Write operations (e.g., edit-config) and delete operations to these data nodes without proper protection or authentication can have a negative effect on network operations. The following subtrees and data nodes have particular sensitivities/vulnerabilities:¶
/pcep/entity/ - configure local parameters, capabilities etc.¶
/pcep/entity/peers - configure remote peers to setup PCEP session.¶
Unauthorized access to the above list can adversely affect the PCEP session between the local entity and the peers. This may lead to the inability to compute new paths, and stateful operations on the delegated as well as PCE-initiated LSPs.¶
Some of the readable data nodes in this YANG module may be considered sensitive or vulnerable in some network environments. It is thus important to control read access (e.g., via get, get-config, or notification) to these data nodes. Specifically, the following subtrees and data nodes have particular sensitivities/ vulnerabilities:¶
/pcep/lsp-db - All the LSPs in the network. Unauthorized access to this could provide all path and network usage information.¶
/pcep/path-keys/ - The Confidential Path Segments (CPS) are hidden using path-keys. Unauthorized access to this could leak confidential path information.¶
Some of the RPC operations in this YANG module may be considered sensitive or vulnerable in some network environments. It is thus important to control access to these operations. Specifically, the following operations have particular sensitivities/vulnerabilities:¶
trigger-resync - trigger resynchronization with the PCE. Unauthorized access to this could force a PCEP session into continuous state synchronization.¶
This YANG module uses groupings from other YANG modules that define nodes that may be considered sensitive or vulnerable in network environments. Refer to the Security Considerations of respective RFCs for information as to which nodes may be considered sensitive or vulnerable in network environments.¶
The YANG module defines a set of identities, types, and groupings. These nodes are intended to be reused by other YANG modules. The module by itself does not expose any data nodes that are writable, data nodes that contain read-only state, or RPCs. As such, there are no additional security issues related to the YANG module that need to be considered.¶
Modules that use the groupings that are defined in this document should identify the corresponding security considerations.¶
The actual authentication key data (whether locally specified or part of a key-chain) is sensitive and needs to be kept secret from unauthorized parties; compromise of the key data would allow an attacker to forge PCEP traffic that would be accepted as authentic, potentially compromising the TE domain.¶
The model describes several notifications, implementations must rate- limit the generation of these notifications to avoid creating a significant notification load. Otherwise, this notification load may have some side effects on the system stability and may be exploited as an attack vector.¶
Further, this document also includes another YANG module (called ietf-pcep-stats) for maintaining the statistics by augmenting the ietf-pcep YANG module. There are no data nodes defined in this module which are writable/creatable/deletable (i.e., config true). The readable data nodes in this YANG module may be considered sensitive or vulnerable in some network environments. It is thus important to control read access (e.g., via get, get-config, or notification) to these data nodes. The statistics could provide information related to the current usage patterns of the network.¶
Some of the RPC operations in this YANG module may be considered sensitive or vulnerable in some network environments. It is thus important to control access to these operations. Specifically, the following operations have particular sensitivities/vulnerabilities:¶
statistics-reset - The RPC is used to reset statistics. An unauthorized reset could impact monitoring.¶
The "auth" container includes various authentication and security options for PCEP. Further, Section 7.1 describes how to configure TLS1.2 and TLS1.3 for a PCEP session via this YANG module.¶
This document requests the IANA to register two URIs in the "IETF XML Registry" [RFC3688]. Following the format in RFC 3688, the following registrations are requested -¶
URI: urn:ietf:params:xml:ns:yang:ietf-pcep
Registrant Contact: The IESG
XML: N/A; the requested URI is an XML namespace.
URI: urn:ietf:params:xml:ns:yang:ietf-pcep-stats
Registrant Contact: The IESG
XML: N/A; the requested URI is an XML namespace.
¶
This document requests the IANA to register two YANG modules in the "YANG Module Names" registry [RFC6020], as follows -¶
Name: ietf-pcep
Namespace: urn:ietf:params:xml:ns:yang:ietf-pcep
Prefix: pcep
Reference: [This.I-D]
Name: ietf-pcep-stats
Namespace: urn:ietf:params:xml:ns:yang:ietf-pcep-stats
Prefix: pcep-stats
Reference: [This.I-D]
¶
[Note to the RFC Editor - remove this section before publication, as well as remove the reference to RFC 7942.]¶
This section records the status of known implementations of the protocol defined by this specification at the time of posting of this Internet-Draft, and is based on a proposal described in [RFC7942]. The description of implementations in this section is intended to assist the IETF in its decision processes in progressing drafts to RFCs. Please note that the listing of any individual implementation here does not imply endorsement by the IETF. Furthermore, no effort has been spent to verify the information presented here that was supplied by IETF contributors. This is not intended as, and must not be construed to be, a catalog of available implementations or their features. Readers are advised to note that other implementations may exist.¶
According to [RFC7942], "this will allow reviewers and working groups to assign due consideration to documents that have the benefit of running code, which may serve as evidence of valuable experimentation and feedback that have made the implemented protocols more mature. It is up to the individual working groups to use this information as they see fit".¶
Currently, there are no known implementations of the YANG Module as specified.¶
The initial document is based on the PCEP MIB [RFC7420]. The authors of this document would like to thank the authors of the above document.¶
Thanks to Martin Bjorklund and Tom Petch for the detailed review. Thanks to Mahesh Jethanandani and Jan Lindblad for the YANGDOCTOR review. Thanks to Scott Kelly for the SECDIR review. Thanks to Gyan Mishra and Matthew Bocci for the RTGDIR review.¶
The module, "ietf-pcep", defines the basic components of a PCE speaker. The tree depth in the tree is set to 10.¶
module: ietf-pcep
+--rw pcep!
+--rw entity
+--rw addr* inet:ip-address-no-zone
+--rw enabled? boolean
+--rw role role
+--rw description? string
+--rw speaker-entity-id? string {sync-opt}?
+--rw admin-status? boolean
+--ro index? uint32
+--ro oper-status? oper-status
+--rw domains
| +--rw domain* [type domain]
| +--rw type identityref
| +--rw domain domain
+--rw capabilities
| +--rw capability? bits
| +--rw pce-initiated? boolean {pce-initiated}?
| +--rw include-db-ver? boolean {stateful,sync-opt}?
| +--rw trigger-resync? boolean {stateful,sync-opt}?
| +--rw trigger-initial-sync? boolean {stateful,sync-opt}?
| +--rw incremental-sync? boolean {stateful,sync-opt}?
| +--rw sr-mpls {sr-mpls}?
| | +--rw enabled? boolean
| | +--rw no-msd-limit? boolean
| | +--rw nai? boolean
| +--rw stateful-gmpls {stateful,gmpls}?
| | +--rw enabled? boolean
| +--rw inter-layer? boolean {inter-layer}?
| +--rw h-pce {h-pce}?
| +--rw enabled? boolean
| +--rw stateful? boolean {stateful}?
| +--rw role? hpce-role
+--ro msd? uint8 {sr-mpls}?
+--rw auth
| +--rw (auth-type-selection)?
| +--:(auth-key-chain)
| | +--rw key-chain?
| | key-chain:key-chain-ref
| +--:(auth-key)
| | +--rw crypto-algorithm identityref
| | +--rw (key-string-style)?
| | +--:(keystring)
| | | +--rw keystring? string
| | +--:(hexadecimal) {key-chain:hex-key-string}?
| | +--rw hexadecimal-string? yang:hex-string
| +--:(auth-tls) {tls}?
| +--rw (role)?
| +--:(server)
| | +--rw tls-server
| | +--rw server-identity
| | | +--rw (auth-type)
| | | ...
| | +--rw client-authentication!
| | | {client-auth-supported}?
| | | +--rw ca-certs! {client-auth-x509-cert}?
| | | | ...
| | | +--rw ee-certs! {client-auth-x509-cert}?
| | | | ...
| | | +--rw raw-public-keys!
| | | | {client-auth-raw-public-key}?
| | | | ...
| | | +--rw tls12-psks? empty
| | | | {client-auth-tls12-psk}?
| | | +--rw tls13-epsks? empty
| | | {client-auth-tls13-epsk}?
| | +--rw hello-params {tlscmn:hello-params}?
| | | +--rw tls-versions
| | | | ...
| | | +--rw cipher-suites
| | | ...
| | +--rw keepalives {tls-server-keepalives}?
| | +--rw peer-allowed-to-send? empty
| | +--rw test-peer-aliveness!
| | ...
| +--:(client)
| +--rw tls-client
| +--rw client-identity!
| | +--rw (auth-type)
| | ...
| +--rw server-authentication
| | +--rw ca-certs! {server-auth-x509-cert}?
| | | ...
| | +--rw ee-certs! {server-auth-x509-cert}?
| | | ...
| | +--rw raw-public-keys!
| | | {server-auth-raw-public-key}?
| | | ...
| | +--rw tls12-psks? empty
| | | {server-auth-tls12-psk}?
| | +--rw tls13-epsks? empty
| | {server-auth-tls13-epsk}?
| +--rw hello-params {tlscmn:hello-params}?
| | +--rw tls-versions
| | | ...
| | +--rw cipher-suites
| | ...
| +--rw keepalives {tls-client-keepalives}?
| +--rw peer-allowed-to-send? empty
| +--rw test-peer-aliveness!
| ...
+--rw pce-info
| +--rw scope
| | +--rw path-scope? bits
| | +--rw intra-area-pref? uint8
| | +--rw inter-area-pref? uint8
| | +--rw inter-as-pref? uint8
| | +--rw inter-layer-pref? uint8
| +--rw neighbour-domains
| | +--rw domain* [type domain]
| | +--rw type identityref
| | +--rw domain domain
| +--rw path-key {path-key}?
| +--rw enabled? boolean
| +--rw discard-timer? uint32
| +--rw reuse-time? uint32
| +--rw pce-id? inet:ip-address-no-zone
+--rw connect-timer? uint16
+--rw connect-max-retry? uint32
+--rw init-back-off-timer uint16
+--rw max-back-off-timer uint32
+--ro open-wait-timer? uint16
+--ro keep-wait-timer? uint16
+--rw keepalive-timer? uint8
+--rw dead-timer? uint8
+--rw allow-negotiation? boolean
+--rw max-keepalive-timer uint8
+--rw max-dead-timer uint8
+--rw min-keepalive-timer uint8
+--rw min-dead-timer uint8
+--rw sync-timer? uint16 {svec}?
+--rw request-timer uint16
+--rw max-sessions uint32
+--rw max-unknown-reqs? uint32
+--rw max-unknown-msgs? uint32
+--rw pcep-notification-max-rate uint32
+--rw stateful-parameter {stateful}?
| +--rw state-timeout uint32
| +--rw redelegation-timeout uint32
| +--rw rpt-non-pcep-lsp? boolean
+--rw of-list {objective-function}?
| +--rw objective-function* [of]
| +--rw of identityref
+--ro lsp-db {stateful}?
| +--ro db-ver? uint64 {sync-opt}?
| +--ro association-list*
| | [type id source global-source extended-id]
| | {association}?
| | +--ro type identityref
| | +--ro id uint16
| | +--ro source inet:ip-address-no-zone
| | +--ro global-source uint32
| | +--ro extended-id string
| | +--ro lsp* [plsp-id pcc-id lsp-id]
| | +--ro plsp-id -> /pcep/entity/lsp-db/lsp/plsp-id
| | +--ro pcc-id leafref
| | +--ro lsp-id leafref
| +--ro lsp* [plsp-id pcc-id lsp-id]
| +--ro plsp-id uint32
| +--ro pcc-id inet:ip-address-no-zone
| +--ro source? inet:ip-address-no-zone
| +--ro destination? inet:ip-address-no-zone
| +--ro tunnel-id? uint16
| +--ro lsp-id uint16
| +--ro extended-tunnel-id? inet:ip-address-no-zone
| +--ro admin-state? boolean
| +--ro operational-state? operational-state
| +--ro delegated
| | +--ro enabled? boolean
| | +--ro peer? -> /pcep/entity/peers/peer/addr
| | +--ro srp-id? uint32
| +--ro initiation {pce-initiated}?
| | +--ro enabled? boolean
| | +--ro peer? -> /pcep/entity/peers/peer/addr
| +--ro symbolic-path-name? string
| +--ro last-error? identityref
| +--ro pst? identityref
| +--ro association-list*
| [type id source global-source extended-id]
| {association}?
| +--ro type
| | -> /pcep/entity/lsp-db/association-list/type
| +--ro id leafref
| +--ro source leafref
| +--ro global-source leafref
| +--ro extended-id leafref
+--ro path-keys {path-key}?
| +--ro path-key* [key]
| +--ro key uint16
| +--ro cps
| | +--ro explicit-route-objects* [index]
| | +--ro index uint32
| +--ro pcc-requester? -> /pcep/entity/peers/peer/addr
| +--ro req-id? uint32
| +--ro retrieved? boolean
| +--ro pcc-retrieved? -> /pcep/entity/peers/peer/addr
| +--ro creation-time? yang:timestamp
| +--ro discard-time? uint32
| +--ro reuse-time? uint32
+--rw peers
+--rw peer* [addr]
+--rw addr inet:ip-address-no-zone
+--rw role role
+--rw description? string
+--rw domains
| +--rw domain* [type domain]
| +--rw type identityref
| +--rw domain domain
+--rw capabilities
| +--rw capability? bits
| +--rw pce-initiated? boolean {pce-initiated}?
| +--rw include-db-ver? boolean
| | {stateful,sync-opt}?
| +--rw trigger-resync? boolean
| | {stateful,sync-opt}?
| +--rw trigger-initial-sync? boolean
| | {stateful,sync-opt}?
| +--rw incremental-sync? boolean
| | {stateful,sync-opt}?
| +--rw sr-mpls {sr-mpls}?
| | +--rw enabled? boolean
| | +--rw no-msd-limit? boolean
| | +--rw nai? boolean
| +--rw stateful-gmpls {stateful,gmpls}?
| | +--rw enabled? boolean
| +--rw inter-layer? boolean {inter-layer}?
| +--rw h-pce {h-pce}?
| +--rw enabled? boolean
| +--rw stateful? boolean {stateful}?
| +--rw role? hpce-role
+--ro msd? uint8 {sr-mpls}?
+--rw pce-info
| +--rw scope
| | +--rw path-scope? bits
| | +--rw intra-area-pref? uint8
| | +--rw inter-area-pref? uint8
| | +--rw inter-as-pref? uint8
| | +--rw inter-layer-pref? uint8
| +--rw neighbour-domains
| +--rw domain* [type domain]
| +--rw type identityref
| +--rw domain domain
+--rw delegation-pref uint8 {stateful}?
+--rw auth
| +--rw (auth-type-selection)?
| +--:(auth-key-chain)
| | +--rw key-chain?
| | key-chain:key-chain-ref
| +--:(auth-key)
| | +--rw crypto-algorithm identityref
| | +--rw (key-string-style)?
| | +--:(keystring)
| | | +--rw keystring? string
| | +--:(hexadecimal) {key-chain:hex-key-string}?
| | +--rw hexadecimal-string? yang:hex-string
| +--:(auth-tls) {tls}?
| +--rw (role)?
| +--:(server)
| | +--rw tls-server
| | ...
| +--:(client)
| +--rw tls-client
| ...
+--ro discontinuity-time? yang:timestamp
+--ro initiate-session? boolean
+--ro session-exists? boolean
+--ro session-up-time? yang:timestamp
+--ro session-fail-time? yang:timestamp
+--ro session-fail-up-time? yang:timestamp
+--ro sessions
+--ro session* [initiator]
+--ro initiator initiator
+--ro role? -> ../../../role
+--ro state-last-change? yang:timestamp
+--ro state? sess-state
+--ro session-creation? yang:timestamp
+--ro connect-retry? yang:counter32
+--ro local-id? uint8
+--ro remote-id? uint8
+--ro keepalive-timer? uint8
+--ro peer-keepalive-timer? uint8
+--ro dead-timer? uint8
+--ro peer-dead-timer? uint8
+--ro ka-hold-time-rem? uint8
+--ro overloaded? boolean
+--ro overloaded-timestamp? yang:timestamp
+--ro overload-time? uint32
+--ro peer-overloaded? boolean
+--ro peer-overloaded-timestamp? yang:timestamp
+--ro peer-overload-time? uint32
+--ro lspdb-sync? sync-state
| {stateful}?
+--ro recv-db-ver? uint64
| {stateful,sync-opt}?
+--ro of-list {objective-function}?
| +--ro objective-function* [of]
| +--ro of identityref
+--ro pst-list
| +--ro path-setup-type* [pst]
| +--ro pst identityref
+--ro assoc-type-list {association}?
| +--ro assoc-type* [at]
| +--ro at identityref
+--ro speaker-entity-id? string
{sync-opt}?
rpcs:
+---x trigger-resync {stateful,sync-opt}?
+---w input
+---w pcc -> /pcep/entity/peers/peer/addr
notifications:
+---n pcep-session-up
| +--ro peer-addr? -> /pcep/entity/peers/peer/addr
| +--ro session-initiator? leafref
| +--ro state-last-change? yang:timestamp
| +--ro state? sess-state
+---n pcep-session-down
| +--ro peer-addr? -> /pcep/entity/peers/peer/addr
| +--ro session-initiator? initiator
| +--ro state-last-change? yang:timestamp
| +--ro state? sess-state
+---n pcep-session-local-overload
| +--ro peer-addr? -> /pcep/entity/peers/peer/addr
| +--ro session-initiator? leafref
| +--ro overloaded? boolean
| +--ro overloaded-timestamp? yang:timestamp
| +--ro overload-time? uint32
+---n pcep-session-local-overload-clear
| +--ro peer-addr?
| | -> /pcep/entity/peers/peer/addr
| +--ro overloaded? boolean
| +--ro overloaded-clear-timestamp? yang:timestamp
+---n pcep-session-peer-overload
| +--ro peer-addr?
| | -> /pcep/entity/peers/peer/addr
| +--ro session-initiator? leafref
| +--ro peer-overloaded? boolean
| +--ro peer-overloaded-timestamp? yang:timestamp
| +--ro peer-overload-time? uint32
+---n pcep-session-peer-overload-clear
+--ro peer-addr?
| -> /pcep/entity/peers/peer/addr
+--ro peer-overloaded? boolean
+--ro peer-overloaded-clear-timestamp? yang:timestamp
¶
The example below provides an overview of PCEP peer session information and LSP-DB in the YANG Module.¶
at PCE:
{
"ietf-pcep:pcep": {
"entity": {
"addr": [
"192.0.2.3",
"2001:db8::3"
],
"role": "pce",
"oper-status": "oper-status-up",
"capabilities": {
"capability": "active passive"
},
"init-back-off-timer": 5,
"max-back-off-timer": 3600,
"max-keepalive-timer": 255,
"max-dead-timer": 255,
"min-keepalive-timer": 1,
"min-dead-timer": 30,
"request-timer": 300,
"max-sessions": 2400,
"pcep-notification-max-rate": 5,
"stateful-parameter": {
"state-timeout": 300
},
"lsp-db": {
"lsp": [
{
"plsp-id": 3,
"pcc-id": "192.0.2.1",
"source": "192.0.2.1",
"destination": "192.0.2.4",
"tunnel-id": 16,
"lsp-id": 3,
"extended-tunnel-id": "0.0.0.0",
"operational-state": "up",
"delegated": {
"enabled": true
},
"symbolic-path-name": "iewauh"
},
{
"plsp-id": 4,
"pcc-id": "192.0.2.2",
"source": "192.0.2.2",
"destination": "192.0.2.5",
"tunnel-id": 17,
"lsp-id": 4,
"extended-tunnel-id": "0.0.0.0",
"operational-state": "up",
"delegated": {
"enabled": true
},
"symbolic-path-name": "iewauhiewauh"
}
]
},
"peers": {
"peer": [
{
"addr": "192.0.2.1",
"role": "pcc",
"capabilities": {
"capability": "active passive"
},
"delegation-pref": 7,
"sessions": {
"session": [
{
"initiator": "remote",
"role": "pcc"
}
]
}
},
{
"addr": "192.0.2.2",
"role": "pcc",
"capabilities": {
"capability": "active passive"
},
"delegation-pref": 5,
"sessions": {
"session": [
{
"initiator": "remote",
"role": "pcc"
}
]
}
},
{
"addr": "2001:db8::4",
"role": "pcc",
"capabilities": {
"capability": "active passive"
},
"delegation-pref": 1,
"sessions": {
"session": [
{
"initiator": "remote",
"role": "pcc"
}
]
}
}
]
}
}
}
}
¶
Similarly a PCEP session with IPv6 address between PCE (2001:db8::3) and a PCC (2001:db8::4) could also be setup.¶
This section describes some of the design objectives for the model:¶
In the case of existing implementations, it needs to map the data model defined in this document to their proprietary data model. To facilitate such mappings, the data model should be simple.¶
The data model should be suitable for new implementations to use as is.¶
The data model should allow for static configurations of peers.¶
The data model should include read-only counters in order to gather statistics for sent and received PCEP messages, received messages with errors, and messages that could not be sent due to errors. This could be in a separate model which augments the base data model.¶
It should be fairly straightforward to augment the base data model for advanced PCE features.¶
If a node implements the PCEP-MIB [RFC7420], data nodes from the YANG module can be mapped to table entries in the PCEP-MIB.¶
| YANG Data Nodes | PCEP MIB Objects |
|---|---|
| /pcep/entity | PcePcepEntityEntry |
| /pcep/entity/peers/peer | pcePcepPeerEntry |
| /pcep/entity/peers/peer/sessions/session | pcePcepSessEntry |
| YANG Data Nodes | PCEP MIB Objects |
|---|---|
| - | pcePcepEntityIndex |
| admin-status | pcePcepEntityAdminStatus |
| oper-status | pcePcepEntityOperStatus |
| addr | pcePcepEntityAddrType, pcePcepEntityAddr |
| connect-timer | pcePcepEntityConnectTimer |
| connect-max-retry | pcePcepEntityConnectMaxRetry |
| init-back-off-timer | pcePcepEntityInitBackoffTimer |
| max-back-off-timer | pcePcepEntityMaxBackoffTimer |
| open-wait-timer | pcePcepEntityOpenWaitTimer |
| keep-wait-timer | pcePcepEntityKeepWaitTimer |
| keepalive-timer | pcePcepEntityKeepAliveTimer |
| dead-timer | pcePcepEntityDeadTimer |
| allow-negotiation | pcePcepEntityAllowNegotiation |
| max-keepalive-timer | pcePcepEntityMaxKeepAliveTimer |
| max-dead-timer | pcePcepEntityMaxDeadTimer |
| min-keepalive-timer | pcePcepEntityMinKeepAliveTimer |
| min-dead-timer | pcePcepEntityMinDeadTimer |
| sync-timer | pcePcepEntitySyncTimer |
| request-timer | pcePcepEntityRequestTimer |
| max-sessions | pcePcepEntityMaxSessions |
| max-unknown-reqs | pcePcepEntityMaxUnknownReqs |
| max-unknown-msgs | pcePcepEntityMaxUnknownMsgs |
| YANG Data Nodes in /pcep/entity/peers/peer | PCEP MIB Objects |
|---|---|
| addr | pcePcepPeerAddrType,pcePcepPeerAddr |
| role | pcePcepPeerRole |
| discontinuity-time | pcePcepPeerDiscontinuityTime |
| initiate-session | pcePcepPeerInitiateSession |
| session-exists | pcePcepPeerSessionExists |
| sess-setup-ok | pcePcepPeerNumSessSetupOK |
| sess-setup-fail | pcePcepPeerNumSessSetupFail |
| session-up-time | pcePcepPeerSessionUpTime |
| session-fail-time | pcePcepPeerSessionFailTime |
| session-fail-up-time | pcePcepPeerSessionFailUpTime |
| /stats/rsp-time-avg | pcePcepPeerAvgRspTime |
| /stats/rsp-time-lwm | pcePcepPeerLWMRspTime |
| /stats/rsp-time-hwm | pcePcepPeerHWMRspTime |
| /stats/pcreq-sent | pcePcepPeerNumPCReqSent |
| /stats/pcreq-rcvd | pcePcepPeerNumPCReqRcvd |
| /stats/pcrep-sent | pcePcepPeerNumPCRepSent |
| /stats/pcrep-rcvd | pcePcepPeerNumPCRepRcvd |
| /stats/pcerr-sent | pcePcepPeerNumPCErrSent |
| /stats/pcerr-rcvd | pcePcepPeerNumPCErrRcvd |
| /stats/pcntf-sent | pcePcepPeerNumPCNtfSent |
| /stats/pcntf-rcvd | pcePcepPeerNumPCNtfRcvd |
| /stats/keepalive-sent | pcePcepPeerNumKeepaliveSent |
| /stats/keepalive-rcvd | pcePcepPeerNumKeepaliveRcvd |
| /stats/unknown-rcvd | pcePcepPeerNumUnknownRcvd |
| /stats/corrupt-rcvd | pcePcepPeerNumCorruptRcvd |
| /stats/req-sent | pcePcepPeerNumReqSent |
| /stats/svec/svec-sent | pcePcepPeerNumSvecSent |
| /stats/svec/svec-req-sent | pcePcepPeerNumSvecReqSent |
| /stats/req-sent-pend-rep | pcePcepPeerNumReqSentPendRep |
| /stats/req-sent-ero-rcvd | pcePcepPeerNumReqSentEroRcvd |
| /stats/req-sent-nopath-rcvd | pcePcepPeerNumReqSentNoPathRcvd |
| /stats/req-sent-cancel-rcvd | pcePcepPeerNumReqSentCancelRcvd |
| /stats/req-sent-error-rcvd | pcePcepPeerNumReqSentErrorRcvd |
| /stats/req-sent-timeout | pcePcepPeerNumReqSentTimeout |
| /stats/req-sent-cancel-sent | pcePcepPeerNumReqSentCancelSent |
| /stats/req-sent-closed | pcePcepPeerNumReqSentClosed |
| /stats/req-rcvd | pcePcepPeerNumReqRcvd |
| /stats/svec/svec-rcvd | pcePcepPeerNumSvecRcvd |
| /stats/svec/svec-req-rcvd | pcePcepPeerNumSvecReqRcvd |
| /stats/req-rcvd-pend-rep | pcePcepPeerNumReqRcvdPendRep |
| /stats/req-rcvd-ero-sent | pcePcepPeerNumReqRcvdEroSent |
| /stats/req-rcvd-nopath-sent | pcePcepPeerNumReqRcvdNoPathSent |
| /stats/req-rcvd-cancel-sent | pcePcepPeerNumReqRcvdCancelSent |
| /stats/req-rcvd-error-sent | pcePcepPeerNumReqRcvdErrorSent |
| /stats/req-rcvd-cancel-rcvd | pcePcepPeerNumReqRcvdCancelRcvd |
| /stats/req-rcvd-closed | pcePcepPeerNumReqRcvdClosed |
| /stats/rep-rcvd-unknown | pcePcepPeerNumRepRcvdUnknown |
| /stats/req-rcvd-unknown | pcePcepPeerNumReqRcvdUnknown |
| YANG Data Nodes in /pcep/entity/peers/peer/sessions/session | PCEP MIB Objects |
|---|---|
| initiator | pcePcepSessInitiator |
| state-last-change | pcePcepSessStateLastChange |
| state | pcePcepSessState |
| connect-retry | pcePcepSessConnectRetry |
| local-id | pcePcepSessLocalID |
| remote-id | pcePcepSessRemoteID |
| keepalive-timer | pcePcepSessKeepaliveTimer |
| peer-keepalive-timer | pcePcepSessPeerKeepaliveTimer |
| dead-timer | pcePcepSessDeadTimer |
| peer-dead-timer | pcePcepSessPeerDeadTimer |
| ka-hold-time-rem | pcePcepSessKAHoldTimeRem |
| overloaded | pcePcepSessOverloaded |
| overloaded-timestamp | pcePcepSessOverloadTime |
| peer-overloaded | pcePcepSessPeerOverloaded |
| peer-overloaded-timestamp | pcePcepSessPeerOverloadTime |
| /stats/discontinuity-time | pcePcepSessDiscontinuityTime |
| /stats/rsp-time-avg | pcePcepSessAvgRspTime |
| /stats/rsp-time-lwm | pcePcepSessLWMRspTime |
| /stats/rsp-time-hwm | pcePcepSessHWMRspTime |
| /stats/pcreq-sent | pcePcepSessNumPCReqSent |
| /stats/pcreq-rcvd | pcePcepSessNumPCReqRcvd |
| /stats/pcrep-sent | pcePcepSessNumPCRepSent |
| /stats/pcrep-rcvd | pcePcepSessNumPCRepRcvd |
| /stats/pcerr-sent | pcePcepSessNumPCErrSent |
| /stats/pcerr-rcvd | pcePcepSessNumPCErrRcvd |
| /stats/pcntf-sent | pcePcepSessNumPCNtfSent |
| /stats/pcntf-rcvd | pcePcepSessNumPCNtfRcvd |
| /stats/keepalive-sent | pcePcepSessNumKeepaliveSent |
| /stats/keepalive-rcvd | pcePcepSessNumKeepaliveRcvd |
| /stats/unknown-rcvd | pcePcepSessNumUnknownRcvd |
| /stats/corrupt-rcvd | pcePcepSessNumCorruptRcvd |
| /stats/req-sent | pcePcepSessNumReqSent |
| /stats/svec/svec-sent | pcePcepSessNumSvecSent |
| /stats/svec/svec-req-sent | pcePcepSessNumSvecReqSent |
| /stats/req-sent-pend-rep | pcePcepSessNumReqSentPendRep |
| /stats/req-sent-ero-rcvd | pcePcepSessNumReqSentEroRcvd |
| /stats/req-sent-nopath-rcvd | pcePcepSessNumReqSentNoPathRcvd |
| /stats/req-sent-cancel-rcvd | pcePcepSessNumReqSentCancelRcvd |
| /stats/req-sent-error-rcvd | pcePcepSessNumReqSentErrorRcvd |
| /stats/req-sent-timeout | pcePcepSessNumReqSentTimeout |
| /stats/req-sent-cancel-sent | pcePcepSessNumReqSentCancelSent |
| /stats/req-rcvd | pcePcepSessNumReqRcvd |
| /stats/svec/svec-rcvd | pcePcepSessNumSvecRcvd |
| /stats/svec/svec-req-rcvd | pcePcepSessNumSvecReqRcvd |
| /stats/req-rcvd-pend-rep | pcePcepSessNumReqRcvdPendRep |
| /stats/req-rcvd-ero-sent | pcePcepSessNumReqRcvdEroSent |
| /stats/req-rcvd-nopath-sent | pcePcepSessNumReqRcvdNoPathSent |
| /stats/req-rcvd-cancel-sent | pcePcepSessNumReqRcvdCancelSent |
| /stats/req-rcvd-error-sent | pcePcepSessNumReqRcvdErrorSent |
| /stats/req-rcvd-cancel-rcvd | pcePcepSessNumReqRcvdCancelRcvd |
| /stats/rep-rcvd-unknown | pcePcepSessNumRepRcvdUnknown |
| /stats/req-rcvd-unknown | pcePcepSessNumReqRcvdUnknown |
| YANG notifications | PCEP MIB NOTIFICATIONS |
|---|---|
| pcep-session-up | pcePcepSessUp |
| pcep-session-down | pcePcepSessDown |
| pcep-session-local-overload | pcePcepSessLocalOverload |
| pcep-session-local-overload-clear | pcePcepSessLocalOverloadClear |
| pcep-session-peer-overload | pcePcepSessPeerOverload |
| pcep-session-peer-overload-clear | pcePcepSessPeerOverloadClear |
Rohit Pobbathi Nokia Networks India EMail: rohit.pobbathi_ashok@nokia.com Vinod KumarS India EMail: vinods.kumar@gmail.com Zafar Ali Cisco Systems Canada EMail: zali@cisco.com Xufeng Liu EMail: xufeng.liu.ietf@gmail.com Young Lee Samsung EMail: younglee.tx@gmail.com Udayasree Palle EMail: udayasreereddy@gmail.com Xian Zhang Huawei Technologies Bantian, Longgang District Shenzhen 518129 P.R.China EMail: zhang.xian@huawei.com Avantika ECI Telecom India EMail: avantika.srm@gmail.com Shashikanth India EMail: shashivh@gmail.com¶