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Enhanced BGP Capabilities for Exchanging Second-best and Back-up Paths

Document Type Expired Internet-Draft (individual)
Expired & archived
Author Brian Dickson
Last updated 2008-02-25
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


This Internet Draft describes an enhanced way to exchange prefix information, to permit multiple copies of a prefix with different paths to be announced and withdrawn. This negotiated capability provides faster local (inter-AS) and global (intra-AS) convergence, reduces path-hunting, improves route- reflector behaviour, including eliminating both persistent oscillations and BGP "wedgies". Additional prefix instances have new optional BGP attributes, to control path selection. Withdrawl of prefixes will require new attributes to disambiguate prefix instances. Benefits are seen both when deployed intra-AS, and on inter-AS peering.Author's Note This Internet Draft is intended to result in this draft or a related draft(s) being placed on the Standards Track for idr. The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [5].


Brian Dickson

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)