A new Request for Comments is now available in online RFC libraries.
RFC 3509
Title: Alternative Implementations of OSPF Area Border
Routers
Author(s): A. Zinin, A. Lindem, D. Yeung
Status: Informational
Date: April 2003
Mailbox: zinin@psg.com, acee@redback.com,
myeung@procket.com
Pages: 12
Characters: 24326
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-ospf-abr-alt-05.txt
URL: ftp://ftp.rfc-editor.org/in-notes/rfc3509.txt
Open Shortest Path First (OSPF) is a link-state intra-domain routing
protocol used for routing in IP networks. Though the definition of
the Area Border Router (ABR) in the OSPF specification does not
require a router with multiple attached areas to have a backbone
connection, it is actually necessary to provide successful routing to
the inter-area and external destinations. If this requirement is not
met, all traffic destined for the areas not connected to such an ABR
or out of the OSPF domain, is dropped. This document describes
alternative ABR behaviors implemented in Cisco and IBM routers.
This document is a product of the Open Shortest Path First IGP Working
Group of the IETF.
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
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