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Versions: 00                                                            
Inter-Domain Routing                                            J. Mauch
Internet-Draft                                                    Akamai
Intended status: Informational                         November 18, 2019
Expires: May 21, 2020


         Provide for method to know accepted and rejected NLRI.
                      draft-mauch-bgp-accepted-00

Abstract

   This document defines a method to receive accepted and rejected NLRI
   over a BGP peering session.

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
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   This Internet-Draft will expire on May 21, 2020.

Copyright Notice

   Copyright (c) 2019 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
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   described in the Simplified BSD License.






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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   2
   3.  Solution  . . . . . . . . . . . . . . . . . . . . . . . . . .   2
   4.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   3
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   4
     7.2.  Informational References  . . . . . . . . . . . . . . . .   4
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   4

1.  Introduction

   BGP [RFC4271] operators face challenges when attempting to
   troubleshoot external BGP sessions.  Commonly operators debug BGP
   sessions with commands that display the results of advertised or
   received routes.

   When operating a network, you can easily verify you are sending
   routes to a BGP peer, but you have limited ability to understand the
   external partner device.  Common debugging tools such as a looking
   glass or contacting a remote operator via e-mail, telephone or other
   out of band methods is required.

   This proposal intends to provide an automated method to see the NLRI
   eligible for selection that pass any filtering methods provided by
   the peer software stack.

2.  Requirements Language

   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] when, and only when, they appear in all capitals, as
   shown here.

3.  Solution

   The requesting device will send a BGP message of type XXX to the
   partner device requesting the list of the NLRI. (excerpted from
   rfc2918)








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             Message Format: One AFI, SAFI encoded as

                     0       7      15      23      31
                     +-------+-------+-------+-------+
                     |      AFI      | Res.  | SAFI  |
                     +-------+-------+-------+-------+

   The meaning, use and encoding of this AFI, SAFI field is the same as
   defined in [BGP-MP, sect. 7].  More specifically,

   AFI - Address Family Identifier (16 bit).

   Res. - Reserved (8 bit) field.  Should be set to 0 by the sender and
   ignored by the receiver.

   SAFI - Subsequent Address Family Identifier (8 bit).

   Responses will include:


             Message Format: per

                     0       15      31      47      64
                     +---+---+---+---+---+---+---+---+
                     |   accepted    |    rejected   |
                     +---+---+---+---+---+---+---+---+

   Count of NLRI accepted (unsigned 32-bits)

   Count of NLRI rejected (unsigned 32-bits)

   List of NLRI accepted (NLRI list in same format as UPDATE)

   List of NLRI rejected (NLRI list in same format as UPDATE -
   infeasible)

4.  Acknowledgements

   The authors would like to thank the following people for their
   comments and support: XXX.

5.  Security Considerations

   This message MAY be subject to rate-limits by a partner device to
   protect itself from CPU or other resource exhaustion.  A suggested
   interval is to not permit more than one request per 60 seconds.





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6.  IANA Considerations

   This document has unknown IANA Considerations

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>.

   [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,
              <https://www.rfc-editor.org/info/rfc4271>.

   [RFC4760]  Bates, T., Chandra, R., Katz, D., and Y. Rekhter,
              "Multiprotocol Extensions for BGP-4", RFC 4760,
              DOI 10.17487/RFC4760, January 2007,
              <https://www.rfc-editor.org/info/rfc4760>.

   [RFC5492]  Scudder, J. and R. Chandra, "Capabilities Advertisement
              with BGP-4", RFC 5492, DOI 10.17487/RFC5492, February
              2009, <https://www.rfc-editor.org/info/rfc5492>.

7.2.  Informational References

   [RFC2918]  Chen, E., "Route Refresh Capability for BGP-4", RFC 2918,
              DOI 10.17487/RFC2918, September 2000,
              <https://www.rfc-editor.org/info/rfc2918>.

Author's Address

   Jared Mauch
   Akamai Technologies Inc.
   8285 Reese Lane
   Ann Arbor  Michigan 48103
   US

   Email: jared@akamai.com









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