http://www.rfc-editor.org/rfc/rfc5553.txt
RFC 5553: Resource Reservation Protocol (RSVP) Extensions for Path Key Support, A. Farrel, R. Bradford, JP. Vasseur2009-05-01T23:00:00-00:00This document describes how to carry Path Key Subobjects in the Resource Reservation Protocol (RSVP) Explicit Route Objects (EROs) and Record Route Objects (RROs) so as to facilitate confidentiality in the signaling of inter-domain TE LSPs. [STANDARDS-TRACK]