SonicOS/X 7 High Availability

About Stateful Synchronization

Stateful Synchronization provides dramatically improved failover performance. When enabled, the network connections and VPN tunnel information is continuously synchronized between the two units so that the Secondary can seamlessly assume all network responsibilities if the Primary Security Appliance fails, with no interruptions to existing network connections.

Stateful HA is supported on the TZ500 and higher TZ platforms with an Extended or Stateful HA upgrade license. For licensing information, see SonicOS7 Settings document.

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