Patent ID: 9736048
Date: 2017-08-15
CPC Classifications: H04L

Claim:
1. A method for detecting a dead peer managing internet protocol (IP) tunnels, the method comprising: sending a request from a first server to establish a virtual private network (VPN) connection over a communication network to a second server; exchanging information between the first server and the second server according to an internet key exchange protocol; identifying that the second server supports phase II tunnels within the VPN connection, wherein a first phase II tunnel and a second phase II tunnel are initiated with the second server; exchanging one or more data packets between the first server and the second server over the first phase II tunnel and the second phase II tunnel; identifying that a packet of the one or more packets has failed; and identifying that at least one of the first phase II tunnel and the second phase II tunnel is dead based on identifying the failed packet.