Patent ID: 8635490
Filing Date: 2014-01-21
Classification: H04L

Abstract:
1. A method comprising: receiving, by a backup network device of a high-availability cluster, a state update message from a primary network device of the high-availability cluster, wherein the state update message indicates a network session being inspected by the primary network device and an identified application-layer protocol for the network session; in response to determining, by the backup network device, that the primary network device has switched over or failed over to the backup network device, receiving, by the backup network device, a packet of the network session, the packet comprising application-layer data; detecting a beginning of a new transaction from the application-layer data of the packet; and processing the application-layer data of the network session that include and follow the beginning of the new transaction without performing stateful processing of application-layer data that precede the beginning of the new transaction.