Deprecation of AS_SET and AS_CONFED_SET in BGP

Document Type Replaced Internet-Draft (candidate for idr WG)
Authors Warren Kumari  , Kotikalapudi Sriram 
Last updated 2019-08-16 (latest revision 2019-08-05)
Replaced by draft-ietf-idr-deprecate-as-set-confed-set
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
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Stream WG state Call For Adoption By WG Issued
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IESG IESG state Replaced by draft-ietf-idr-deprecate-as-set-confed-set
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


BCP 172 (i.e., RFC 6472) recommends not using AS_SET and AS_CONFED_SET in Border Gateway Protocol (BGP). This document updates RFC 4271 and proscribes the use of the AS_SET and AS_CONFED_SET types of path segments in the AS_PATH. This is done to simplify the design and implementation of BGP and to make the semantics of the originator of a route clearer. This will also simplify the design, implementation, and deployment of various BGP security mechanisms.


Warren Kumari (
Kotikalapudi Sriram (

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