Internet-Draft draft-ietf-rtgwg-bgp-pic-22.txt is now available. It 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
Name: draft-ietf-rtgwg-bgp-pic-22.txt
Pages: 32
Dates: 2025-04-20
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-22
A diff from the previous version is available at:
https://author-tools.ietf.org/iddiff?url2=draft-ietf-rtgwg-bgp-pic-22
Internet-Drafts are also available by rsync at:
rsync.ietf.org::internet-drafts
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