http://www.rfc-editor.org/rfc/rfc4861.txt
RFC 4861: Neighbor Discovery for IP version 6 (IPv6), T. Narten, E. Nordmark, W. Simpson, H. Soliman2007-09-01T23:00:00-00:00This document specifies the Neighbor Discovery protocol for IP Version 6. IPv6 nodes on the same link use Neighbor Discovery to discover each other's presence, to determine each other's link-layer addresses, to find routers, and to maintain reachability information about the paths to active neighbors. [STANDARDS-TRACK]