GROW C. Lin Internet-Draft New H3C Technologies Intended status: Standards Track Y. Liu Expires: 31 August 2026 China Mobile M. Srivastava Hewlett Packard Enterprise 27 February 2026 Extension for BMP Peer Header draft-lin-grow-bmp-peer-interface-00 Abstract This document defines new BMP peer types that allows the per-peer header to carry its corresponding interface information, especially in order to distinguish BGP peers established based on interfaces. 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 31 August 2026. Copyright Notice Copyright (c) 2026 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. Lin, et al. Expires 31 August 2026 [Page 1] Internet-Draft BMP Peer Interface February 2026 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 2 3. New BMP Peer Types . . . . . . . . . . . . . . . . . . . . . 2 3.1. Definition . . . . . . . . . . . . . . . . . . . . . . . 2 3.2. Format . . . . . . . . . . . . . . . . . . . . . . . . . 3 4. Operational Considerations . . . . . . . . . . . . . . . . . 3 5. Security Considerations . . . . . . . . . . . . . . . . . . . 4 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4 7. References . . . . . . . . . . . . . . . . . . . . . . . . . 4 7.1. Normative References . . . . . . . . . . . . . . . . . . 4 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 4 1. Introduction When BGP establishes a peer relationship using a Link-Local address or unnumbered address, the local outgoing interface must be specified for the relationship to be established successfully. In other words, BGP Link-Local or unnumbered peers may only be distinguished by interface information. However, the per-peer information in a BMP message does not include interface information, making it impossible to distinguish which BGP Link-Local peer or unnumbered peer the reported BMP message originated from. This document defines new BMP peer types that allows the per-peer header to carry its corresponding peer interface information. 2. Terminology 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. 3. New BMP Peer Types 3.1. Definition This section defines new BMP peer types for reporting the BMP messages that need to be distinguished through peer interface intormation. The peer types are defined as follows: Lin, et al. Expires 31 August 2026 [Page 2] Internet-Draft BMP Peer Interface February 2026 * Peer Type = TBD1 (RECOMMENDED value 4): Global Instance Interface Peer. * Peer Type = TBD2 (RECOMMENDED value 5): RD Instance Interface Peer. BMP messages using the peer types defined in this document MUST include peer interface information. 3.2. Format For new BMP peer types defined in this document, this section defines a interface per-peer header. It is defined according to per-peer header of [RFC7854], as shown below: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Peer Type | Peer Flags | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Peer Distinguisher (present based on peer type) | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Peer Address (16 bytes) | ~ ~ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Peer Interface Index (present based on peer type) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Peer AS | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Peer BGP ID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Timestamp (seconds) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Timestamp (microseconds) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Compared with per-peer header of [RFC7854], the Peer Interface Index is added to indicate the interface used to establish BGP peers. Other fields are defined in Section 4.2 of [RFC7854] and Section 4 of [RFC8671]. 4. Operational Considerations TBD Lin, et al. Expires 31 August 2026 [Page 3] Internet-Draft BMP Peer Interface February 2026 5. Security Considerations TBD 6. IANA Considerations TBD 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, . [RFC7854] Scudder, J., Ed., Fernando, R., and S. Stuart, "BGP Monitoring Protocol (BMP)", RFC 7854, DOI 10.17487/RFC7854, June 2016, . [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May 2017, . [RFC8671] Evens, T., Bayraktar, S., Lucente, P., Mi, P., and S. Zhuang, "Support for Adj-RIB-Out in the BGP Monitoring Protocol (BMP)", RFC 8671, DOI 10.17487/RFC8671, November 2019, . Authors' Addresses Changwang Lin New H3C Technologies Beijing China Email: linchangwang.04414@h3c.com Yisong Liu China Mobile 32 Xuanwumen West Street Beijing Xicheng District, 100053 China Email: liuyisong@chinamobile.com Lin, et al. Expires 31 August 2026 [Page 4] Internet-Draft BMP Peer Interface February 2026 Mukul Srivastava Hewlett Packard Enterprise Email: mukul.srivastava@hpe.com Lin, et al. Expires 31 August 2026 [Page 5]