Patent ID: 7286512

Claim:
A method of establishing mobile network communications, comprising: receiving at an agent node a first message requesting a mobile network session with a mobile node, the first message including a home address field, a care-of address field, and an extension field, the extension field including at least one substitute address; selecting a home address, wherein the home address is selected from the home address field if the home address field does not include a void address value and from the extension field if the home address field includes a void address value; selecting a care-of address, wherein the care-of address is selected from the care-of address field if the care-of field does not include a void address value and from the extension field if the care-of address field includes a void address value; and configuring the agent node to establish a mobile network session with the mobile node, wherein packet data addressed to the selected home address is forwarded to the selected care-of address.