http://www.rfc-editor.org/rfc/rfc2471.txt
RFC 2471: IPv6 Testing Address Allocation, R. Hinden, R. Fink, J. Postel1998-12-01T23:00:00-00:00This document describes an allocation plan for IPv6 addresses to be used in testing IPv6 prototype software. This memo defines an Experimental Protocol for the Internet community.