Bidirectional Forwarding Detection (BFD) for Multi-point Networks and Virtual Router Redundancy Protocol (VRRP) Use Case
draft-mirsky-bfd-p2mp-vrrp-use-case-05
BFD Working Group G. Mirsky
Internet-Draft ZTE Corp.
Updates: 5798 (if approved) J. Tantsura
Intended status: Standards Track Apstra
Expires: May 5, 2021 G. Mishra
Verizon Inc.
November 1, 2020
Bidirectional Forwarding Detection (BFD) for Multi-point Networks and
Virtual Router Redundancy Protocol (VRRP) Use Case
draft-mirsky-bfd-p2mp-vrrp-use-case-05
Abstract
This document discusses the use of Bidirectional Forwarding Detection
(BFD) for multipoint networks to provide Virtual Router Redundancy
Protocol (VRRP) with sub-second Master convergence and defines the
extension to bootstrap point-to-multipoint BFD session.
This draft updates RFC 5798.
Status of This Memo
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This Internet-Draft will expire on May 5, 2021.
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Internet-Draft BFD P2MP Use in VRRP November 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Conventions used in this document . . . . . . . . . . . . 3
1.1.1. Terminology . . . . . . . . . . . . . . . . . . . . . 3
1.1.2. Requirements Language . . . . . . . . . . . . . . . . 3
2. Problem Statement . . . . . . . . . . . . . . . . . . . . . . 3
3. Applicability of p2mp BFD . . . . . . . . . . . . . . . . . . 3
3.1. Multipoint BFD Encapsulation . . . . . . . . . . . . . . 5
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5
5. Security Considerations . . . . . . . . . . . . . . . . . . . 5
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 5
7. Normative References . . . . . . . . . . . . . . . . . . . . 5
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 6
1. Introduction
The [RFC5798] is the current specification of the Virtual Router
Redundancy Protocol (VRRP) for IPv4 and IPv6 networks. VRRPv3 allows
for a faster switchover to a Backup router. Using such capability
with the software-based implementation of VRRP may prove challenging.
But it still may be possible to deploy VRRP and provide sub-second
detection of Master router failure by Backup routers.
Bidirectional Forwarding Detection (BFD) [RFC5880] had been
originally defined detect failure of point-to-point (p2p) paths:
single-hop [RFC5881], multihop [RFC5883]. Single-hop BFD may be used
to enable Backup routers to detect a failure of the Master router
within 100 msec or faster.
[RFC8562] extends [RFC5880] for multipoint and multicast networks,
which is precisely characterizes deployment scenarios for VRRP over
LAN segment. This document demonstrates how point-to-multipoint
(p2mp) BFD can enable faster detection of Master failure and thus
minimize service disruption in a VRRP domain. The document also
defines the extension to VRRP [RFC5798] to bootstrap a VRRP Backup
router to join in p2mp BFD session.
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1.1. Conventions used in this document
1.1.1. Terminology
BFD: Bidirectional Forwarding Detection
p2mp: Pont-to-Multipoint
VRRP: Virtual Router Redundancy Protocol
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