BGP - AS_SET and AS_CONFED_SET are deprecated

When implementing BGP, AS_SET and AS_CONFED_SET are segment types used for specific purposes.

• The AS_SET contains unordered set of ASes a route in the UPDATE message has traversed.
• The AS_CONFED_SET contains an unordered set of sub-ASes in the AS_PATH

Both of these, according to the most recent RFC, have been depreciated and are recommended not to be used in BGP implementations.

Links:

https://forum.networklessons.com/t/bgp-confederation-explained/1130/78?u=lagapidis

https://datatracker.ietf.org/doc/draft-ietf-idr-deprecate-as-set-confed-set/