Flexible BGP Communities

Document Type Expired Internet-Draft (individual)
Authors Andrew Lange , Jeffrey Haas  , Keyur Patel  , Shane Amante 
Last updated 2010-08-02 (latest revision 2004-06-24)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document defines a new attribute for BGP called the Flexible Community attribute. Flexible Communities build on the experience and utility of the standard BGP community, and the extended BGP community attributes. This attribute allows operators to associate structured information with a route or set of routes. This information can be then be used to execute routing policy. An enhanced version of communities is necessary to accommodate IPv6, 4-byte ASN's, and introduce a more extensible and flexible policy expression. This document also introduces the concept of Neighbor Classes. A Neighbor Class is applied to a group of BGP neighbors who share certain attributes. For example, the PEER Neighbor Class could be applied to BGP sessions between ASN X and other networks with which ASN X has a non-transit peering relationship.


Andrew Lange (andrew.lange@alcatel-lucent.com)
Jeffrey Haas (jhaas@pfrc.org)
Keyur Patel (keyupate@cisco.com)
Shane Amante (shane@castlepoint.net)

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