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A well-known BGP community to denote prefixes used for Anycast

Document Type Expired Internet-Draft (grow WG)
Expired & archived
Authors Maximilian Wilhelm , Fredy Künzler
Last updated 2024-05-29 (Latest revision 2023-11-26)
Replaces draft-wilhelm-grow-anycast-community
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Additional resources Mailing list discussion
Stream WG state WG Document
Document shepherd (None)
IESG IESG state Expired
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


In theory routing decisions on the Internet and by extension within ISP networks should always use hot-potato routing to reach any given destination. In reality operators sometimes choose to not use the hot-potato paths to forward traffic due to a variety of reasons, mostly motivated by traffic engineering considerations. For prefixes carrying anycast traffic in virtually all situations it is advisable to stick to the hot-potato principle. As operators mostly don't know which prefixes are carrying unicast or anycast traffic, they can't differentiate between them in their routing policies. To allow operators to take well informed decisions on which prefixes are carrying anycast traffic this document proposes a well-known BGP community to denote this property.


Maximilian Wilhelm
Fredy Künzler

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