BGP Diagnostic Path Attribute
draft-heitz-idr-diagnostic-attr-00

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Last updated 2019-03-11
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IDR                                                             J. Heitz
Internet-Draft                                              P. Narasimha
Intended status: Standards Track                            S. Gulrajani
Expires: September 11, 2019                                        Cisco
                                                          March 10, 2019

                     BGP Diagnostic Path Attribute
                   draft-heitz-idr-diagnostic-attr-00

Abstract

   A BGP path attribute for the purpose of network diagnostics is
   described.  It is non-transitive, such that BGP speakers will not
   forward it by default.  It is structured as a list of elements.  An
   element begins with the BGP identifier and AS number of the speaker
   that adds the element and includes a list of TLVs.  Any speaker can
   add or remove an element to/from the list.  TLVs for a timestamp and
   for a checksum are described.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119].

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
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   This Internet-Draft will expire on September 11, 2019.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Heitz, et al.          Expires September 11, 2019               [Page 1]
Internet-Draft          BGP Diagnostic Attribute              March 2019

   This document is subject to BCP 78 and the IETF Trust's Legal
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Data Formats  . . . . . . . . . . . . . . . . . . . . . . . .   2
     2.1.  Timestamp TLV . . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  Checksum TLV  . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Operational Considerations  . . . . . . . . . . . . . . . . .   4
   4.  Error Handling  . . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   7.  Normative References  . . . . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

   A BGP path attribute for the purpose of network diagnostics is
   described.  It is non-transitive, such that BGP speakers will not
   propagate it by default.  It is structured as a list of elements.  An
   element begins with the BGP identifier and AS number of the speaker
   that adds the element and includes a list of TLVs.  Any speaker can
   add or remove an element to/from the list.  TLVs for a timestamp and
   for a checksum are described.  The diagnostic attribute may be sent
   in a withdraw message.

2.  Data Formats

   The BGP diagnostic consists of a series of elements, each of which is
   formatted as follows.

Heitz, et al.          Expires September 11, 2019               [Page 2]
Internet-Draft          BGP Diagnostic Attribute              March 2019

    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
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                              ASN                              |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                         BGP Identfifier                       |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |              Length           |                               |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+                               +
   |                                                               |
   +                              TLVs                             +
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