http://www.rfc-editor.org/rfc/rfc5172.txt
RFC 5172: Negotiation for IPv6 Datagram Compression Using IPv6 Control Protocol, S. Varada2008-03-01T23:00:00-00:00This document defines the IPv6 datagram compression option that can be negotiated by a node on the link through the IPV6CP. [STANDARDS-TRACK]