TLV support for BMP Route Monitoring and Peer Down Messages
draft-lucente-bmp-tlv-00
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Global Routing Operations P. Lucente
Internet-Draft NTT Communications
Updates: 7854 (if approved) Y. Gu
Intended status: Standards Track Huawei
Expires: January 2, 2020 H. Smit
Independent
July 1, 2019
TLV support for BMP Route Monitoring and Peer Down Messages
draft-lucente-bmp-tlv-00
Abstract
Most of the message types defined by the BGP Monitoring Protocol
(BMP) do provision for optional trailing data; however Route
Monitoring message (to provide a snapshot of the monitored Routing
Information Base) and Peer Down message (to indicate that a peering
session was terminated) do not. Supporting optional data in TLV
format across all BMP message types allows for an homogeneous and
extensible surface that would be useful for the most different use-
cases that need to convey additional data to a BMP station. While
this document does not want to cover any specific utilization
scenario, it defines a simple way to support optional TLV data in all
message types.
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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This Internet-Draft will expire on January 2, 2020.
Copyright Notice
Copyright (c) 2019 IETF Trust and the persons identified as the
document authors. All rights reserved.
Lucente, et al. Expires January 2, 2020 [Page 1]
Internet-Draft BMP TLV July 2019
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. TLV encoding . . . . . . . . . . . . . . . . . . . . . . . . 3
4. BMP Message Format . . . . . . . . . . . . . . . . . . . . . 4
4.1. Common Header . . . . . . . . . . . . . . . . . . . . . . 4
4.2. TLV data in Route Monitoring . . . . . . . . . . . . . . 4
4.3. TLV data in Peer Down . . . . . . . . . . . . . . . . . . 4
4.4. TLV data in other BMP messages . . . . . . . . . . . . . 4
5. Security Considerations . . . . . . . . . . . . . . . . . . . 4
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5
7. Normative References . . . . . . . . . . . . . . . . . . . . 5
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 6
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 6
1. Introduction
The BGP Monitoring Protocol (BMP) is defined in RFC 7854 [RFC7854].
The Route Monitoring message consists of:
o Common Header
o Per-Peer Header
o BGP Update PDU
The Peer Down Notification message consists of:
o Common Header
o Per-Peer Header
o Reason
o Data (only if Reason code is 1, 2 or 3)
Lucente, et al. Expires January 2, 2020 [Page 2]
Internet-Draft BMP TLV July 2019
This means that both Route Monitoring and Peer Down messages have a
non-extensible format. In the Route Monitoring case this is limiting
if wanting to transmit characteristics of transported NLRIs (ie. to
help stateless parsing) or vendor-specific data; in the Peer Down
case this is limiting if wanting to match TLVs shipped with the Peer
Up. The proposal of this document is to bump the BMP version, for
backward compatibility, and allow all message types to provision for
trailing TLV data.
2. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
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