Patent ID: 8560644

Claim:
An apparatus, comprising: a proxy mobile Internet Protocol entity; wherein the proxy mobile Internet Protocol entity includes a logic processor configured to intercept a Dynamic Host Configuration Protocol (DHCP) request message sent by a mobile node on a first subnet; wherein the proxy mobile Internet Protocol entity is configured to insert, via the logic processor, data representative of a second subnet into a subnet selection option of the DHCP request message intercepted on the first subnet to bind the mobile node to the second subnet by requesting an Internet Protocol (IP) address associated with the second subnet; wherein the proxy mobile Internet Protocol entity is configured to forward the intercepted DHCP request message with the data representative of a subnet selection option representative of the second subnet to at least one DHCP server; wherein the proxy mobile Internet Protocol entity is configured to intercept a multiplicity of DHCP reply messages destined for the mobile node sent from at least one DHCP server; wherein the proxy mobile Internet Protocol entity is configured to select a DHCP reply message from the multiplicity of reply messages destined for the mobile node, the selected DHCP reply message having a subnet identifier data in a subnet selection option matching the second subnet; wherein the proxy mobile Internet Protocol entity is configured to forward the selected DHCP reply message to the mobile node; and wherein the proxy mobile Internet Protocol entity is further configured to discard remaining DHCP reply messages from the multiplicity of reply messages destined for the mobile node.