Network Working Group X. Xu Internet-Draft China Mobile Intended status: Standards Track S. Hegde Expires: 5 May 2025 S. Sangli Juniper S. Zhang J. Dong Huawei 1 November 2024 Route Target ORF draft-xu-idr-route-target-orf-02 Abstract This document defines a new Outbound Router Filter (ORF) type for BGP, referred to as "Route Target Outbound Route Filter", that can be used to perform route target based route filtering. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at https://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on 5 May 2025. Copyright Notice Copyright (c) 2024 IETF Trust and the persons identified as the document authors. All rights reserved. Xu, et al. Expires 5 May 2025 [Page 1] Internet-Draft Route Target ORF November 2024 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. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Requirements Language . . . . . . . . . . . . . . . . . . 2 2. Route Target ORF Entry Encoding . . . . . . . . . . . . . . . 2 3. Route Target ORF Matching . . . . . . . . . . . . . . . . . . 3 4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 3 5. Security Considerations . . . . . . . . . . . . . . . . . . . 3 6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 3 7. References . . . . . . . . . . . . . . . . . . . . . . . . . 3 7.1. Normative References . . . . . . . . . . . . . . . . . . 3 7.2. Informative References . . . . . . . . . . . . . . . . . 4 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 4 1. Introduction The Outbound Route Filtering Capability defined in [RFC5291] provides a mechanism for a BGP speaker to send to its BGP peer a set of Outbound Route Filters (ORFs) that can be used by its peer to filter its outbound routing updates to the speaker. This document defines a new Outbound Router Filter (ORF) type for BGP, referred to as "Route Target Outbound Route Filter", that can be used to perform route target based route filtering. 1.1. Requirements Language The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [RFC2119]. 2. Route Target ORF Entry Encoding The value of the ORF-Type for the Route Target ORF is TBD. Xu, et al. Expires 5 May 2025 [Page 2] Internet-Draft Route Target ORF November 2024 The Route Target ORF entry is encoded as follows: the "Action", "Match" and "Reserved" fields are encoded in the common part [RFC5291], while the "Route Target" field of 8 octets is encoded in the "type specific part" [RFC5291] . When the Action component of an ORF entry specifies REMOVE-ALL, the entry consists of only the common part. The Route Target field is filled with a route target value used for searching matching routes. A route target value of zeroļ¼Œreferred to as the default route target, means any route target value would be considered as matched. 3. Route Target ORF Matching In addition to the general procedures defined in [RFC5291], the following procedures are specified as follows: When performing route matching search on VPN routes, those VPN routes are associated with the Route Target as specified in the received Route Target ORF entries would be considered as matched routes . If the Route Target as specified in the received Route Target ORF entries is filled with all zeros, all VPN routes would be considered as matched routes. 4. IANA Considerations The value of the ORF-Type for the Route Target ORF is to be allocated by IANA. 5. Security Considerations This extension to BGP does not change the underlying security issues in [RFC4271] 6. Acknowledgements The authors would like to thank xxx for their valuable comments and suggestions on this document. 7. References 7.1. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . Xu, et al. Expires 5 May 2025 [Page 3] Internet-Draft Route Target ORF November 2024 [RFC4271] Rekhter, Y., Ed., Li, T., Ed., and S. Hares, Ed., "A Border Gateway Protocol 4 (BGP-4)", RFC 4271, DOI 10.17487/RFC4271, January 2006, . [RFC4364] Rosen, E. and Y. Rekhter, "BGP/MPLS IP Virtual Private Networks (VPNs)", RFC 4364, DOI 10.17487/RFC4364, February 2006, . [RFC4659] De Clercq, J., Ooms, D., Carugi, M., and F. Le Faucheur, "BGP-MPLS IP Virtual Private Network (VPN) Extension for IPv6 VPN", RFC 4659, DOI 10.17487/RFC4659, September 2006, . [RFC4684] Marques, P., Bonica, R., Fang, L., Martini, L., Raszuk, R., Patel, K., and J. Guichard, "Constrained Route Distribution for Border Gateway Protocol/MultiProtocol Label Switching (BGP/MPLS) Internet Protocol (IP) Virtual Private Networks (VPNs)", RFC 4684, DOI 10.17487/RFC4684, November 2006, . [RFC5291] Chen, E. and Y. Rekhter, "Outbound Route Filtering Capability for BGP-4", RFC 5291, DOI 10.17487/RFC5291, August 2008, . [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May 2017, . 7.2. Informative References Authors' Addresses Xiaohu Xu China Mobile Email: xuxiaohu_ietf@hotmail.com Shraddha Hegde Juniper Email: shraddha@juniper.net Srihari Sangli Juniper Email: ssangli@juniper.net Xu, et al. Expires 5 May 2025 [Page 4] Internet-Draft Route Target ORF November 2024 Shunwan Huawei Email: zhuangshunwan@huawei.com Jie Huawei Email: jie.dong@huawei.com Xu, et al. Expires 5 May 2025 [Page 5]