Patent ID: 9077617
Filing Date: 2015-07-07
Classification: H04L

Abstract:
1. A method comprising: maintaining, with a secondary control unit of a network device, a prioritized data structure having a plurality of hierarchically arranged nodes, each of the nodes associated with a different subset of application-level communication sessions having a common session timeout value, wherein the nodes of the prioritized data structure are maintained in an ordered arrangement in accordance with the common session timeout values of the respective subset of the communication sessions with which each node is associated; detecting, with the secondary control unit of a network device, a failover event that causes the network device to failover from a primary control unit of the network device to the secondary control unit; and in response to detecting the failover event, sending, with an operating system of the secondary control unit, a session maintenance message on each of the plurality of application-level communication sessions in accordance with the prioritized data structure.