Document Type Replaced Internet-Draft (individual)
Authors Ahmed Bashandy  , Clarence Filsfils  , Prodosh Mohapatra 
Last updated 2015-11-09
Replaced by draft-ietf-rtgwg-bgp-pic
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


In the network comprising thousands of iBGP peers exchanging millions of routes, many routes are reachable via more than one path. Given the large scaling targets, it is desirable to restore traffic after failure in a time period that does not depend on the number of BGP prefixes. In this document we proposed an architecture by which traffic can be re-routed to ECMP or pre-calculated backup paths in a timeframe that does not depend on the number of BGP prefixes. The objective is achieved through organizing the forwarding chains in a hierarchical manner and sharing forwarding elements among the maximum possible number of routes. The proposed technique achieves prefix independent convergence while ensuring incremental deployment, complete transparency and automation, and zero management and provisioning effort. It is noteworthy to mention that the benefits of BGP-PIC are hinged on the existence of more than one path whether as ECMP or primary-backup.


Ahmed Bashandy (bashandy@cisco.com)
Clarence Filsfils (cfilsfil@cisco.com)
Prodosh Mohapatra (mpradosh@yahoo.com)

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