Recommendation for Not Using AS_SET and AS_CONFED_SET in BGP
Warren Kumari, Kotikalapudi Sriram · 2011
This document deprecates the use of the AS_SET and AS_CONFED_SET types of the AS_PATH in BGPv4. This is done to simplify the design and implementation of the BGP protocol and to make the semantics of the originator of a route more clear. This will also simplify the design, implementation and deployment of bonging work in the Secure Inter- Domain Routing Working Group.