I-D Action: draft-ietf-rtgwg-bgp-pic-19.txt
internet-drafts@ietf.org Sat, 01 April 2023 23:46 UTC
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Subject: I-D Action: draft-ietf-rtgwg-bgp-pic-19.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories. This Internet-Draft is a work item of the Routing Area Working Group (RTGWG) WG of the IETF. Title : BGP Prefix Independent Convergence Authors : Ahmed Bashandy Clarence Filsfils Prodosh Mohapatra Filename : draft-ietf-rtgwg-bgp-pic-19.txt Pages : 32 Date : 2023-04-01 Abstract: In a network comprising thousands of BGP peers exchanging millions of routes, many routes are reachable via more than one next-hop. 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. This document describes an architecture by which traffic can be re- routed to equal cost multi-path (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 data structures in a hierarchical manner and sharing forwarding elements among the maximum possible number of routes. The described technique yields prefix independent convergence while ensuring incremental deployment, complete automation, and zero management and provisioning effort. It is noteworthy to mention that the benefits of BGP Prefix Independent Convergence (BGP-PIC) are hinged on the existence of more than one path whether as ECMP or primary-backup. The IETF datatracker status page for this Internet-Draft is: https://datatracker.ietf.org/doc/draft-ietf-rtgwg-bgp-pic/ There is also an htmlized version available at: https://datatracker.ietf.org/doc/html/draft-ietf-rtgwg-bgp-pic-19 A diff from the previous version is available at: https://author-tools.ietf.org/iddiff?url2=draft-ietf-rtgwg-bgp-pic-19 Internet-Drafts are also available by rsync at rsync.ietf.org::internet-drafts
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