BMP Extension for Path Marking TLV
draft-cppy-grow-bmp-path-marking-tlv-02

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Document Type Active Internet-Draft (individual)
Authors Camilo Cardona  , Paolo Lucente  , Pierre Francois  , Yunan Gu  , Thomas Graf 
Last updated 2020-01-03 (latest revision 2019-10-31)
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Network Working Group                                         C. Cardona
Internet-Draft                                                P. Lucente
Intended status: Standards Track                                     NTT
Expires: July 6, 2020                                        P. Francois
                                                               INSA-Lyon
                                                                   Y. Gu
                                                                  Huawei
                                                                 T. Graf
                                                                Swisscom
                                                        January 03, 2020

                   BMP Extension for Path Marking TLV
                draft-cppy-grow-bmp-path-marking-tlv-02

Abstract

   The BGP Monitoring Protocol (BMP) provides an interface for obtaining
   BGP Path information.  BGP Path Information is conveyed within BMP
   Route Monitoring (RM) messages.  This document proposes an extension
   to BMP to convey the status of a BGP path after being processed by
   the BGP best-path selection algorithm.  This extension makes use of
   the TLV mechanims described in draft-lucente-bmp-tlv
   [I-D.lucente-bmp-tlv].

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 RFC 2119 [RFC2119] RFC 8174 [RFC8174] when, and only when, they
   appear in all capitals, as shown here.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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Cardona, et al.           Expires July 6, 2020                  [Page 1]
Internet-Draft            BMP path marking tlv              January 2020

   This Internet-Draft will expire on July 6, 2020.

Copyright Notice

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Path Marking TLV for the RM Message . . . . . . . . . . . . .   3
     2.1.  Path Status . . . . . . . . . . . . . . . . . . . . . . .   4
       2.1.1.  IANA-registered Path Status Encoding  . . . . . . . .   4
       2.1.2.  Enterprise-specific Path Status Encoding  . . . . . .   5
     2.2.  Reason Code . . . . . . . . . . . . . . . . . . . . . . .   6
       2.2.1.  IANA-registered Reason Code Encoding  . . . . . . . .   6
       2.2.2.  Enterprise-specific Reason Code Encoding  . . . . . .   6
   3.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
     4.1.  Path Marking TLV  . . . . . . . . . . . . . . . . . . . .   7
     4.2.  Path Marking TLV Reason Code  . . . . . . . . . . . . . .   7
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   6.  Normative References  . . . . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   For a given prefix, multiple paths with different path status, e.g.,
   the "best-path", "back-up path" and so on, may co-exist in the BGP
   RIB after being processed by the local policy and the BGP decision
   process.  The path status information is currently not carried in the
   BGP Update Message RFC4271 [RFC4271] or in the BMP Update Message
   RFC7854 [RFC7854].

   External systems can use the path status for various applications.
   The path status is commonly checked by operators when performing
   troubleshooting.  Having such status stored in a centralized system
   can enable the development of tools facilitating this process.

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