I-D ACTION:draft-ietf-ospf-ospfv3-update-05.txt

Internet-Drafts@ietf.org Fri, 12 August 2005 20:00 UTC

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From: Internet-Drafts@ietf.org
Subject: I-D ACTION:draft-ietf-ospf-ospfv3-update-05.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Open Shortest Path First IGP Working Group of the IETF.

	Title		: OSPF for IPv6
	Author(s)	: D. Ferguson, et al.
	Filename	: draft-ietf-ospf-ospfv3-update-05.txt
	Pages		: 95
	Date		: 2005-8-12
	
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 rather
   than on a per-IP-subnet basis.  Flooding scope for LSAs has been
   generalized.  Authentication has been removed from the OSPF protocol
   and instead relies on IPv6's Authentication Header and Encapsulating
   Security Payload.

   Even with larger IPv6 packet, most packets in OSPF for IPv6 are
   almost as compact as those in OSPF for IPv4.  Most fields and 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 demand
   circuit support, NSSA areas, and the multicast extensions to OSPF
   (MOSPF) are also supported in OSPF for IPv6.

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