http://www.rfc-editor.org/rfc/rfc5308.txt
RFC 5308: Routing IPv6 with IS-IS, C. Hopps2008-10-01T23:00:00-00:00This document specifies a method for exchanging IPv6 routing information using the IS-IS routing protocol. The described method utilizes two new TLVs: a reachability TLV and an interface address TLV to distribute the necessary IPv6 information throughout a routing domain. Using this method, one can route IPv6 along with IPv4 and OSI using a single intra-domain routing protocol. [STANDARDS-TRACK]