BGP-4 Implementation Report
RFC 4276

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• 02

Network Working Group                                           S. Hares
Request for Comments: 4276                                       NextHop
Category: Informational                                        A. Retana
                                                                   Cisco
                                                            January 2006

                      BGP-4 Implementation Report

Status of This Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2006).

Abstract

   This document reports the results of the BGP-4 implementation survey.
   The survey had 259 questions about implementations' support of BGP-4
   as specified in RFC 4271.  After a brief summary of the results, each
   response is listed.  This document contains responses from the four
   implementers that completed the survey (Alcatel, Cisco, Laurel, and
   NextHop) and brief information from three that did not (Avici, Data
   Connection Ltd., and Nokia).

   The editors did not use exterior means to verify the accuracy of the
   information submitted by the respondents.  The respondents are
   experts with the products they reported on.

Table of Contents

   1. Introduction ....................................................3
      1.1. Conventions Used in This Document ..........................4
   2. Results of Survey ...............................................4
      2.1. Significant Differences ....................................4
      2.2. Overview of Differences ....................................5
      2.3. Implementations and Interoperability .......................6
      2.4. BGP Implementation Identification ..........................7
   3. BGP-4 Implementation Report .....................................7
      3.0. Summary of Operation / Section 3 [RFC4271] .................7
      3.1. Routes: Advertisement and Storage / Section 3.1 [RFC4271] ..8
      3.2. Routing Information Bases / Section 3.2 [RFC4271] ..........9
      3.3. Message Formats / Section 4 [RFC4271] ......................9
      3.4. Message Header Format / Section 4.1 [RFC4271] .............10

Hares & Retana               Informational                      [Page 1]
RFC 4276              BGP-4 Implementation Report           January 2006

      3.5. OPEN Message / Section 4.2 [RFC4271] ......................11
      3.6. UPDATE Message Format / Section 4.3 [RFC4271] .............12
      3.7. KEEPALIVE Message Format / Section 4.4 [RFC4271] ..........16
      3.8. NOTIFICATION Message Format / Section 4.5 [RFC4271] .......17
      3.9. Path Attributes /Section 5 [RFC4271] ......................17
      3.10. ORIGIN / Section 5.1.1 [RFC4271] .........................22
      3.11. AS_PATH / Section 5.1.2 [RFC4271] ........................22
      3.12. NEXT_HOP / Section 5.1.3 [RFC4271] .......................23
      3.13. MULTI_EXIT_DISC / Section 5.1.4 [RFC4271] ................27
      3.14. LOCAL_PREF / Section 5.1.5 [RFC4271] .....................30
      3.15. ATOMIC_AGGREGATE / Section 5.1.6 [RFC4271] ...............31
      3.16. AGGREGATOR / Section 5.1.7 [RFC4271] .....................32
      3.17. BGP Error Handling / Section 6 [RFC4271] .................34
      3.18. Message Header Error Handling / Section 6.1 [RFC4271] ....34
      3.19. OPEN Message Error Handling / Section 6.2 [RFC4271] ......36
      3.20. UPDATE Message Error Handling / Section 6.3 [RFC4271] ....40
      3.21. NOTIFICATION Message Error Handling / Section 6.4
            [RFC4271] ................................................50
      3.22. Hold Timer Expired Error Handling / Section 6.5
            [RFC4271] ................................................51
      3.23. Finite State Machine Error Handling / Section 6.6
            [RFC4271] ................................................51
      3.24. Cease / Section 6.7 [RFC4271] ............................51
      3.25. BGP Connection Collision Detection / Section 6.8
            [RFC4271] ................................................53
      3.26. BGP Version Negotiation / Section 7 [RFC4271] ............54
      3.27. BGP Finite State Machine (FSM) / Section 8 [RFC4271] .....55
      3.28. Administrative Events / Section 8.1.2 [RFC4271] ..........55
      3.29. Timer Events / Section 8.1.3 [RFC4271] ...................61
      3.30. TCP Connection-Based Events / Section 8.1.4 [RFC4271] ....62
      3.31. BGP Messages-Based Events / Section 8.1.5 [RFC4271] ......63
      3.32. FSM Definition / Section 8.2.1 [RFC4271] .................65
      3.33. FSM and Collision Detection / Section 8.2.1.2 [RFC4271] ..66
      3.34. FSM Event numbers / Section 8.2.1.4 [RFC4271] ............66
      3.35. Finite State Machine / Section 8.2.2 [RFC4271] ...........67
      3.36. UPDATE Message Handling / Section 9 [RFC4271] ............67