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.