Browse Prior Art Database

OSPF for IPv6 (RFC2740)

IP.com Disclosure Number: IPCOM000003337D
Original Publication Date: 1999-Dec-01
Included in the Prior Art Database: 2000-Sep-13

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R. Coltun: AUTHOR [+3]

Abstract

This document describes the modifications to OSPF to support version 6 of the Internet Protocol (IPv6). The fundamental mechanisms of OSPF (flooding, DR election, area support, SPF calculations, etc.) remain unchanged. However, some changes have been necessary, either due to changes in protocol semantics between IPv4 and IPv6, or simply to handle the increased address size of IPv6.

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Network Working Group R. Coltun

Requests for Comments: 2740 Siara Systems

Category: Standards Track D. Ferguson

Juniper Networks

J. Moy

Sycamore Networks

December 1999

OSPF for IPv6

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 (1999). All Rights Reserved.

Abstract

This document describes the modifications to OSPF to support version

6 of the Internet Protocol (IPv6). The fundamental mechanisms of

OSPF (flooding, DR election, area support, SPF calculations, etc.)

remain unchanged. However, some changes have been necessary, either

due to changes in protocol semantics between IPv4 and IPv6, or simply

to handle the increased address size of IPv6.

Changes between OSPF for IPv4 and this document include the

following. Addressing semantics have been removed from OSPF packets

and the basic LSAs. New LSAs have been created to carry IPv6

addresses and prefixes. OSPF now runs on a per-link basis, instead of

on a per-IP-subnet basis. Flooding scope for LSAs has been

generalized. Authentication has been removed from the OSPF protocol

itself, instead relying on IPv6's Authentication Header and

Encapsulating Security Payload.

Most packets in OSPF for IPv6 are almost as compact as those in OSPF

for IPv4, even with the larger IPv6 addresses. Most field-XSand

packet-size limitations present in OSPF for IPv4 have been relaxed.

In addition, option handling has been made more flexible.

All of OSPF for IPv4's optional capabilities, including on-demand

circuit support, NSSA areas, and the multicast extensions to OSPF

(MOSPF) are also supported in OSPF for IPv6.

Table of Contents

1 Introduction ........................................... 4

1.1 Terminology ............................................ 4

2 Differences from OSPF for IPv4 ......................... 4

2.1 Protocol processing per-link, not per-subnet ........... 5

2.2 Remo...