Virtual Router Redundancy Protocol
draft-ietf-vrrp-spec-05

The information below is for an old version of the document that is already published as an RFC
Document Type RFC Internet-Draft (vrrp WG)
Authors Peter Higginson  , Bob Hinden  , Peter Hunt  , Steve Knight  , Acee Lindem  , Danny Mitzel  , Mike Shand  , Douglas Weaver  , David Whipple 
Last updated 2013-03-02 (latest revision 1998-02-03)
Stream Internet Engineering Task Force (IETF)
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INTERNET-DRAFT                                                 S. Knight
February 2, 1998                                               D. Weaver
                                             Ascend Communications, Inc.
                                                              D. Whipple
                                                         Microsoft, Inc.
                                                               R. Hinden
                                                               D. Mitzel
                                                                 P. Hunt
                                                                   Nokia
                                                            P. Higginson
                                                                M. Shand
                                                 Digital Equipment Corp.
                                                             Acee Lindem
                                                         IBM Corporation

                   Virtual Router Redundancy Protocol

                     <draft-ietf-vrrp-spec-05.txt>

Status of this Memo

   This document is an Internet-Draft.  Internet-Drafts are working
   documents of the Internet Engineering Task Force (IETF), its areas,
   and its working groups.  Note that other groups may also distribute
   working documents as Internet-Drafts.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
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   To learn the current status of any Internet-Draft, please check the
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   Rim).

   This internet draft expires on August 2, 1998.

Abstract

   This memo defines the Virtual Router Redundancy Protocol (VRRP).
   VRRP specifies an election protocol that dynamically assigns
   responsibility for a virtual router to one of the VRRP routers on a
   LAN.  The VRRP router controlling the IP address(es) associated with

draft-ietf-vrrp-spec-05.txt                                     [Page 1]
INTERNET-DRAFT     Virtual Router Redundancy Protocol    February 2 1998

   a virtual router is called the Master, and forwards packets sent to
   these IP addresses.  The election process provides dynamic fail over
   in the forwarding responsibility should the Master become
   unavailable.  This allows any of the virtual router IP addresses on
   the LAN to be used as the default first hop router by end-hosts.  The
   advantage gained from using VRRP is a higher availability default
   path without requiring configuration of dynamic routing or router
   discovery protocols on every end-host.

Table of Contents

   1.  Introduction...............................................3
   2.  Required Features..........................................5
   3.  VRRP Overview..............................................6
   4.  Sample Configurations......................................8
   5.  Protocol..................................................10
      5.1  VRRP Packet Format....................................10
      5.2  IP Field Descriptions.................................10
      5.3  VRRP Field Descriptions...............................11
   6.  Protocol State Machine....................................14
      6.1  Parameters............................................14
      6.2  Timers................................................15
      6.3  State Transition Diagram..............................15
      6.4  State Descriptions....................................15
   7.  Sending and Receiving VRRP Packets........................19
      7.1  Receiving VRRP Packets................................19
      7.2  Transmitting Packets..................................19
      7.3  Virtual MAC Address...................................20
   8.  Operational Issues........................................20
      8.1  ICMP Redirects........................................20
      8.2  Host ARP Requests.....................................20
      8.3  Proxy ARP.............................................21
   9.  Operation over FDDI and Token Ring........................21
      9.1  Operation over FDDI...................................21
      9.2  Operation over Token Ring.............................22
   10. Security Considerations...................................24
      10.1  No Authentication....................................24
      10.2  Simple Text Password.................................24
      10.3  IP Authentication Header.............................25
   11. Acknowledgments...........................................25
   12. References................................................26
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