Patent ID: 8407355
Filing Date: 2013-03-26
Classification: H04L

Abstract:
1. A method comprising: storing, by a backup network device, information, associated with a plurality of communication sessions that are supported by a master network device, in a session table of the backup network device, the information including identification information of a communication session, of the plurality of communication sessions, and a session timer associated with the communication session; detecting, by the backup network device, that the session timer, associated with the communication session, has reached a particular value; sending, by the backup network device, a first message to the master network device based on detecting that the session timer has reached the particular value, the first message including the identification information of the communication session; receiving, by the backup network device, a second message or a third message, from the master network device, based on sending the first message to the master network device; determining, by the backup network device, whether the session timer, associated with the communication session, has expired; removing, by the backup network device, an entry, corresponding to the communication session, from the session table, when: setting, by the backup network device, the session timer to another value when the third message has been received from the mater network device, the third message: