



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.

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   This Internet-Draft will expire on 31 August 2026.

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   provided without warranty as described in the Revised BSD License.



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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:




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   *  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






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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,
              <https://www.rfc-editor.org/info/rfc2119>.

   [RFC7854]  Scudder, J., Ed., Fernando, R., and S. Stuart, "BGP
              Monitoring Protocol (BMP)", RFC 7854,
              DOI 10.17487/RFC7854, June 2016,
              <https://www.rfc-editor.org/info/rfc7854>.

   [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
              2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
              May 2017, <https://www.rfc-editor.org/info/rfc8174>.

   [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, <https://www.rfc-editor.org/info/rfc8671>.

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




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   Mukul Srivastava
   Hewlett Packard Enterprise
   Email: mukul.srivastava@hpe.com
















































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