BFD for Multipoint Networks over Point-to-Multi-Point MPLS LSP
draft-mirsky-mpls-p2mp-bfd-12
MPLS Working Group G. Mirsky
Internet-Draft ZTE Corp.
Intended status: Standards Track G. Mishra
Expires: May 6, 2021 Verizon Inc.
D. Eastlake
Futureway Technologies
November 2, 2020
BFD for Multipoint Networks over Point-to-Multi-Point MPLS LSP
draft-mirsky-mpls-p2mp-bfd-12
Abstract
This document describes procedures for using Bidirectional Forwarding
Detection (BFD) for multipoint networks to detect data plane failures
in Multiprotocol Label Switching (MPLS) point-to-multipoint (p2mp)
Label Switched Paths (LSPs) using active tails with unsolicited
notifications mode. It also describes the applicability of LSP Ping,
as in-band, and the control plane, as out-band, solutions to
bootstrap a BFD session in this environment.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Conventions used in this document . . . . . . . . . . . . . . 2
2.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
2.2. Requirements Language . . . . . . . . . . . . . . . . . . 3
3. Multipoint BFD Encapsulation . . . . . . . . . . . . . . . . 3
3.1. IP Encapsulation of Multipoint BFD . . . . . . . . . . . 4
3.2. Non-IP Encapsulation of Multipoint BFD . . . . . . . . . 4
4. Bootstrapping Multipoint BFD . . . . . . . . . . . . . . . . 5
4.1. LSP Ping . . . . . . . . . . . . . . . . . . . . . . . . 5
4.2. Operation of Multipoint BFD with Active Tail over P2MP
MPLS LSP . . . . . . . . . . . . . . . . . . . . . . . . 6
4.3. Control Plane . . . . . . . . . . . . . . . . . . . . . . 7
5. Security Considerations . . . . . . . . . . . . . . . . . . . 7
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 7
7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 8
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 8
8.1. Normative References . . . . . . . . . . . . . . . . . . 8
8.2. Informative References . . . . . . . . . . . . . . . . . 9
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 10
1. Introduction
[RFC8562] defines a method of using Bidirectional Detection (BFD)
[RFC5880] to monitor and detect unicast failures between the sender
(head) and one or more receivers (tails) in multipoint or multicast
networks. [RFC8562] added two BFD session types - MultipointHead and
MultipointTail. Throughout this document, MultipointHead and
MultipointTail refer to the value of the bfd.SessionType is set on a
BFD endpoint. This document describes procedures for using such
modes of BFD protocol to detect data plane failures in Multiprotocol
Label Switching (MPLS) point-to-multipoint (p2mp) Label Switched
Paths (LSPs). The document also describes the applicability of out-
band solutions to bootstrap a BFD session in this environment.
2. Conventions used in this document
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