Cisco Technology, Inc.

Vinaychandra Shankarkumar

Mingqi Deng

Samuel G Henderson

An apparatus is provided in one example embodiment and it includes a first node coupled to an active endpoint and a standby endpoint. The first node communicates with a second node. When the active endpoint experiences a failure, the standby endpoint is activated such that a communication involving the second node continues. The standby endpoint communicates a complete window's worth of packets to the second node after the failure, the window's worth of packets including a last known sequence number acknowledged by the second node. In more specific embodiments, the first node is an L2TP network server (LNS) and the second node is an L2TP access concentrator (LAC). The last known sequence number was check pointed by the active endpoint to the standby endpoint.

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Morrisville, NC, United States of America

Vinaychandra Shankarkumar