Patent ID: 8848609

Claim:
A method comprising: receiving a handoff message at a second wireless controller in a second Internet Protocol version 6 (IPv6) domain from a first wireless controller in a first IPv6 domain, the handoff message comprising information for a multicast group that is used to forward network control information originating from an IPv6 network router of the first IPv6 domain, wherein the network control information is intended for a mobile client device that was first associated with the first wireless controller and has roamed to the second IPv6 domain, wherein the information for the multicast group comprises a virtual local area network identifier, a network identifier that uniquely identifies a network associated with the first network controller, and a link-local multicast group address; joining, by the second wireless controller, a multicast group based on the information contained in the handoff message; establishing a communication path between the second wireless controller and the mobile client device within the second IPv6 domain; extracting by the second wireless controller network control information for the mobile client device received from the first wireless controller via a multicast stream associated with the multicast group; and forwarding the network control information to the mobile client device via the communication path within the second IPv6 domain.