Patent ID: 7518987
Filing Date: 2009-04-14
Classification: H04L

Abstract:
1. A method of facilitating session based communications with a local host associated with a plurality of redundant network devices that also each implement network address translation, wherein the network devices includes an active network device that is adapted to use a first public address space and a standby network device that is adapted to use a second public address space, the method comprising: after the active network device fails and the standby network devices becomes a new active network device, causing an address server to be updated with a new public address assigned to the local host by the new active network device from its second address space, wherein the new public address is used by the new active network device to translate a private address of the local host that is used in data sent, via the new active network device, between the local host and other remote hosts, wherein this updating of the address server is caused by the new active network device and allows other remote hosts to access the local host by obtaining the new public address from the address server and then using the new public address in data sent from the other remote hosts to the local host via the new active network device, which translates such new public address into the private address of the local host.