RFC - 3509
Alternative Implementations of OSPF Area Border Routers
| Original: | ftp://ftp.isi.edu/in-notes/rfc3509.txt |
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| Authors: | A. Zinin [Alcatel], A. Lindem [Redback Networks], D. Yeung [Procket Networks] |
| Date: | April 2003 |
| Category: | Informational |
| Referred by: | 1 RFC |
| Refers to: | 1 RFC |
Status
This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2003). All Rights Reserved.
Abstract
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.
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prepared by Miloslav Nic
- the founder of Zvon.org and Law-Ref.org
- the head of B.Sc. program Informatics and chemistry [in Czech]
- the founder of Lidem.org - Volby 2006 - parliamentary elections in the Czech Republic [in Czech]
- the chief consultant of the publishing house ICT Press
- and Pavel Srb, a student of B.Sc. program Informatics and chemistry