Patent ID: 8646090
Filing Date: 2014-02-04
Classification: H04L

Abstract:
1. A method comprising: receiving, by a network device, a plurality of packets, determining, by the network device, that the anti-replay sequence number of a particular packet, of the plurality of packets, exceeds an upper limit of a predetermined range of anti-replay sequence numbers; shifting, by the network device, the predetermined range of anti-replay sequence numbers by an amount that is based on the anti-replay sequence number of the particular packet, determining, by the network device and when another anti-replay sequence number of another packet, of the plurality of packets, falls below the shifted predetermined range of anti-replay sequence numbers, whether the anti-replay number of the other packet falls within an extended range of anti-replay sequence numbers, determining, by the network device and when the anti-replay sequence number of the other packet falls within the extended range, whether the other packet arrived at the network device before the particular packet by less than a threshold amount of time, selectively: