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The AS_PATHLIMIT Path Attribute
draft-ietf-idr-as-pathlimit-03

Document type: Expired Internet-Draft (idr WG)
Document stream: IETF
Last updated: 2007-01-05
Intended RFC status: Unknown
Other versions: (expired, archived): plain text, pdf, html

IETF State: WG Document
Document shepherd: No shepherd assigned

IESG State: Expired
Responsible AD: (None)
Send notices to: No addresses provided

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found here:
http://www.ietf.org/archive/id/draft-ietf-idr-as-pathlimit-03.txt

Abstract

This document describes the 'AS path limit' (AS_PATHLIMIT) path attribute for BGP. This is an optional, transitive path attribute that is designed to help limit the distribution of routing information in the Internet. By default, prefixes advertised into the BGP graph are distributed freely, and if not blocked by policy will propagate globally. This is harmful to the scalability of the routing subsystem since information that only has a local effect on routing will cause state creation throughout the default-free zone. This attribute can be attached to a particular path to limit its scope to a subset of the Internet.

Authors

Tony Li <tony.li@tony.li>

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