[OSPF] RFC 5243 on OSPF Database Exchange Summary List Optimization

[Richard Ogier <ogier at earthlink.net>]

(The following announcement was posted on the IETF-Announce mailing
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        RFC 5243

        Title:      OSPF Database Exchange Summary List
                    Optimization
        Author:     R. Ogier
        Status:     Informational
        Date:       May 2008
        Mailbox:    rich.ogier at earthlink.net
        Pages:      5
        Characters: 11029
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-ogier-ospf-dbex-opt-03.txt

        URL:        http://www.rfc-editor.org/rfc/rfc5243.txt

This document describes a backward-compatible optimization for the
Database Exchange process in OSPFv2 and OSPFv3.  In this optimization,
a router does not list a Link State Advertisement (LSA) in Database
Description packets sent to a neighbor, if the same or a more recent
instance of the LSA was listed in a Database Description packet
already received from the neighbor.  This optimization reduces
Database Description overhead by about 50% in large networks.  This
optimization does not affect synchronization, since it only omits
unnecessary information from Database Description packets.  This memo
provides information for the Internet community.


INFORMATIONAL: This memo provides information for the Internet community.
It does not specify an Internet standard of any kind. Distribution of
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