Browse Prior Art Database

Virtual Router Redundancy Protocol (RFC2338)

IP.com Disclosure Number: IPCOM000002906D
Original Publication Date: 1998-Apr-01
Included in the Prior Art Database: 2019-Feb-15
Document File: 27 page(s) / 34K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

S. Knight: AUTHOR [+8]

Related Documents

10.17487/RFC2338: DOI

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. [STANDARDS-TRACK]

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 7% of the total text.

Network Working Group S. Knight Request for Comments: 2338 D. Weaver Category: Standards Track Ascend Communications, Inc. D. Whipple Microsoft, Inc. R. Hinden D. Mitzel P. Hunt Nokia P. Higginson M. Shand Digital Equipment Corp. A. Lindem IBM Corporation April 1998

Virtual Router Redundancy Protocol

Status of this Memo

This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (1998). All Rights Reserved.

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 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.

Knight, et. al. Standards Track [Page 1]

RFC 2338 VRRP April 1998

Table of Contents

1. Introduction...............................................2 2. Required Features..........................................5 3. VRRP Overview..............................................6 4. Sample Configurations......................................8 5. Protocol...................................................9 5.1 VRRP Packet Format....................................10 5.2 IP Field Descriptions.................................10 5.3 VRRP Field Descriptions...............................11 6. Protocol State Machine....................................13 6.1 Parameters............................................13 6.2 Timers................................................15 6.3 State Transition Diagram..............................15 6.4 State Descriptions....................................15 7. Sending and Receiving VRRP Packets........................18 7.1 Receiving VRRP Packets................................18 7.2 Transmitting Packets..................................19 7.3 Virtual MAC Address...................................19 8. Operational Issues........................................20 8.1 ICMP Redirects........................................20 8.2 Host ARP Requests.....................................20 8.3 Proxy ARP.............................................20 9. Operation over FDDI and Token Ring........................21 9.1 Operation over FDDI............

Processing...
Loading...