Patent ID: 7082118

Claim:
A method of enabling a session between a mobile node and a correspondent node to continue without termination when said mobile node moves from an old location to a new location, wherein said mobile node is assigned an old address in said old location and a new address in said new location, said old address being contained in a first layer-3 network address space and said new address being contained in a second layer-3 network address space, said method comprising: configuring a first network device to replace said old address with said new address in a destination address field of a packet sent by said correspondent node, wherein said first network device is located in a path from said correspondent node to said mobile node, wherein said configuring is performed after said mobile node moves from said old location to said new location, wherein said configuring enables said correspondent node to continue to send packets using said old layer-3 address even after said mobile node is assigned said new address.