Bidirectional Forwarding Detection (BFD) for Multi-point Networks and Virtual Router Redundancy Protocol (VRRP) Use Case
draft-mirsky-bfd-p2mp-vrrp-use-case-01

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BFD Working Group                                              G. Mirsky
Internet-Draft                                                 ZTE Corp.
Updates: 5798 (if approved)                                  J. Tantsura
Intended status: Standards Track                         October 3, 2017
Expires: April 6, 2018

 Bidirectional Forwarding Detection (BFD) for Multi-point Networks and
           Virtual Router Redundancy Protocol (VRRP) Use Case
                 draft-mirsky-bfd-p2mp-vrrp-use-case-01

Abstract

   This document discusses use of Bidirectional Forwarding Detection
   (BFD) for multi-point networks to provide Virtual Router Redundancy
   Protocol (VRRP) with sub-second Master convergence and defines the
   extension to bootstrap point-to-multipoint BFD session.

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 April 6, 2018.

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   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Conventions used in this document . . . . . . . . . . . .   2
       1.1.1.  Terminology . . . . . . . . . . . . . . . . . . . . .   2
       1.1.2.  Requirements Language . . . . . . . . . . . . . . . .   3
   2.  Problem Statement . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Applicability of p2mp BFD . . . . . . . . . . . . . . . . . .   3
   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 faster switchover to a Backup router.  Using such capability with
   software-based implementation of VRRP is 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 failure of the Master router
   within 100 msec or faster.  [I-D.nitish-vrrp-bfd] demonstrates how,
   with some extensions to [RFC5798], that can be achieved.

   [I-D.ietf-bfd-multipoint] 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.

1.1.  Conventions used in this document

1.1.1.  Terminology

   BFD: Bidirectional Forwarding Detection

   p2mp: Pont-to-Multipoint

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