[rfc-dist] RFC 4811 on OSPF Out-of-Band Link State Database (LSDB) Resynchronization

rfc-editor@rfc-editor.org rfc-editor at rfc-editor.org
Wed Mar 21 02:12:43 PDT 2007

A new Request for Comments is now available in online RFC libraries.

        RFC 4811

        Title:      OSPF Out-of-Band Link State Database 
                    (LSDB) Resynchronization 
        Author:     L. Nguyen, A. Roy,
                    A. Zinin
        Status:     Informational
        Date:       March 2007
        Mailbox:    lhnguyen at cisco.com, 
                    akr at cisco.com, 
                    alex.zinin at alcatel-lucent.com
        Pages:      10
        Characters: 18976
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-nguyen-ospf-oob-resync-06.txt

        URL:        http://www.rfc-editor.org/rfc/rfc4811.txt

OSPF is a link-state intra-domain routing protocol used in IP
networks.  Link State Database (LSDB) synchronization in OSPF is
achieved via two methods -- initial LSDB synchronization when an OSPF
router has just been connected to the network and asynchronous
flooding that ensures continuous LSDB synchronization in the presence
of topology changes after the initial procedure was completed.  It may
sometime be necessary for OSPF routers to resynchronize their LSDBs.
The OSPF standard, however, does not allow routers to do so without
actually changing the topology view of the network.

This memo describes a vendor-specific mechanism to perform such a form
of out-of-band LSDB synchronization.  The mechanism described in this
document was proposed before Graceful OSPF Restart, as described in
RFC 3623, came into existence.  It is implemented/supported by at
least one major vendor and is currently deployed in the field.  The
purpose of this document is to capture the details of this mechanism
for public use.  This mechanism is not an IETF standard.  This memo 
provides information for the Internet community.

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