BGP Custom Decision Process

Document Type Expired Internet-Draft (idr WG)
Authors Alvaro Retana  , Russ White 
Last updated 2017-08-07 (latest revision 2017-02-03)
Replaces draft-retana-bgp-custom-decision
Stream Internet Engineering Task Force (IETF)
Intended RFC status Proposed Standard
Expired & archived
plain text pdf htmlized bibtex
Stream WG state WG Document
Revised I-D Needed - Issue raised by WG
Document shepherd Susan Hares
IESG IESG state Expired
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The BGP specification describes a Decision Process for selecting the best route. This process uses a series of steps, made up of path attributes and other values, to first determine the Degree of Preference of a route and later as tie breakers. While existing mechanisms may achieve some of the same results described in this document, they can only do so through extensive configuration such as matching communities to explicit policy and/or route preference configurations present on each BGP speaker within their administrative domain (autonomous system). Implementing some specific fine grained policies through such mechanisms is cumbersome, if even possible. This document defines a new Extended Community, called the Cost Community, which may be used as part of the Decision Process. The end result is a local Custom Decision Process.


Alvaro Retana (
Russ White (

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