I-D ACTION:draft-ietf-ospf-abr-alt-05.txt

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This draft is a work item of the Open Shortest Path First IGP Working Group of the IETF.

	Title		: Alternative OSPF ABR Implementations
	Author(s)	: A. Zinin, A. Lindem, D. Yeung
	Filename	: draft-ietf-ospf-abr-alt-05.txt
	Pages		: 10
	Date		: 2002-10-24
	
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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