Patent ID: 7729314

Claim:
In a network device, a method of preventing a client from being assigned a new IP address, comprising: receiving a detection message by the network device from the client, wherein the detection message is an ARP; transmitting a response by the network device to the client, wherein the response indicates that the client is on a home network of the client regardless of whether the client is on the home network, wherein the response is an ARP reply; receiving a second detection message by the network device from the client, wherein the second detection message is an ICMP PING request; transmitting a second response by the network device to the client, wherein the second response indicates that the client is on the home network of the client regardless of whether the client is on the home network, wherein the second response is an ICMP PING reply; and determining by the network device whether proxy Mobile IP is enabled; wherein transmitting the second response by the network device to the client is performed when it is determined that proxy Mobile IP is enabled, wherein the network device includes a processor and a memory.