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OSPFv3 Graceful Restart (RFC5187)

IP.com Disclosure Number: IPCOM000171502D
Original Publication Date: 2008-Jun-01
Included in the Prior Art Database: 2008-Jun-12
Document File: 8 page(s) / 15K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

P. Pillay-Esnault: AUTHOR [+2]

Abstract

This document describes the OSPFv3 graceful restart. The OSPFv3 graceful restart is identical to that of OSPFv2 except for the differences described in this document. These differences include the format of the grace Link State Advertisements (LSAs) and other considerations.

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Network Working Group                                  P. Pillay-Esnault Request for Comments: 5187                                 Cisco Systems Category: Standards Track                                      A. Lindem                                                         Redback Networks                                                                June 2008

                         OSPFv3 Graceful Restart

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.

Abstract

   This document describes the OSPFv3 graceful restart.  The OSPFv3    graceful restart is identical to that of OSPFv2 except for the    differences described in this document.  These differences include    the format of the grace Link State Advertisements (LSAs) and other    considerations.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 2

   2. 

Grace

Link

State

Advertisement  . . . . . . . . . . . . . . . . 2

     2.1.  Grace LSA - LS Type . . . . . . . . . . . . . . . . . . . . 2

     2.2.  Grace LSA Format  . . . . . . . . . . . . . . . . . . . . . 3

   3.  Additional Considerations for OSPFv3 Graceful Restart . . . . . 4

     3.1.  Preservation of LSA ID to Prefix Correspondence . . . . . . 4

     3.2.  Preservation of Interface IDs for Link-LSAs,

           Network-LSAs, and Router-LSAs . . . . . . . . . . . . . . . 4

   4.  Security Considerations . . . . . . . . . . . . . . . . . . . . 5

   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5

   6.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 5

   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 5

     7.1.  Normative References  . . . . . . . . . . . . . . . . . . . 5

     7.2.  Informative References  . . . . . . . . . . . . . . . . . . 6

 Pillay-Esnault & Lindem     Standards Track                     [Page 1]
 RFC 5187                OSPFv3 Graceful Restart                June 2008

 1.  Introduction

   Graceful OSPF restart [GRACE] describes a mechanism to restart the    control plane of an OSPFv2 [OSPFv2] router that still has its    forwarding plane intact with a minimum of...