http://www.rfc-editor.org/rfc/rfc7898.txt
RFC 7898: Domain Subobjects for Resource Reservation Protocol - Traffic Engineering (RSVP-TE), D. Dhody, U. Palle, V. Kondreddy, R. Casellas2016-06-01T23:00:00-00:00This document specifies new subobjects to include or exclude Autonomous Systems (ASes), which are identified by a 4-byte AS number, and Interior Gateway Protocol (IGP) areas during path setup.