Renesas Mobile Cisco Cisco Orange China Mobile This specification defines an extension to the IPv6 Neighbor Discovery protocol and the stateless address autoconfiguration procedure. A new Prefix Information Option with meta data is defined that describe the properties and other prefix class meta data associated with the prefix. The stateless address autoconfiguration procedure and end hosts can make use of the additional properties and class information when selecting prefixes for a particular uses and use cases. This specification updates RFC4861 and also updates RFC4862.