RFC 3509

Alternative Implementations of OSPF Area Border Routers, April 2003

Canonical URL:
https://www.rfc-editor.org/rfc/rfc3509.txt
File formats:
Plain TextPDF
Status:
INFORMATIONAL
Authors:
A. Zinin
A. Lindem
D. Yeung
Stream:
IETF
Source:
ospf (rtg)

Cite this RFC: TXT  |  XML

DOI:  10.17487/RFC3509

Discuss this RFC: Send questions or comments to ospf@ietf.org

Other actions: Submit Errata  |  Find IPR Disclosures from the IETF


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. This memo provides information for the Internet community.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 4844.


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