Best Practices for Advertisement of Multiple Paths in BGP

Fri, 07/23/2010 - 21:41 by Pierre François


Add-Paths is a BGP enhancement that allows a BGP router to advertise
multiple distinct paths for the same prefix/NLRI. This provides a
number of potential benefits, including reduced routing churn, faster
convergence and better loadsharing.

This document provides recommendations to implementers of Add-Paths
so that network operators have the tools needed to address their
specific applications and to manage the scalability impact of Add-
Paths. A router implementing Add-Paths may learn many paths for a
prefix and must decide which of these to advertise to peers. This
document analyses different algorithms for making this selection and
provides recommendations based on the target application.

James Uttaro, Virginie Van den Schrieck, Pierre Francois, Roberto Fragassi, Adam Simpson and Pradosh Mohapatra
Internet Draft, July 2010.
Cite it
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draft-uttaro-idr-add-paths-guidelines-02.txt37.47 KB