H3C Technologies H3C SecBlade LB Cards - Manual (Page 88)

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d. Click Apply.
Figure 39 Configuring stateful failover
Configuring Device B
Except the Main Device for Configuration Synchronization and Auto Synchronization settings that are
not needed for Device B, other settings on Device B are consistent with those on Device A and are not
shown.
Configuring stateful failover at the CLI
Stateful failover configuration task list
To implement stateful failover on two devices, you need to perform the following configurations:
• Routing configuration. Configure VRRP or a dynamic routing protocol on the devices and the
uplink/downlink devices to make sure that the traffic can automatically switch to the other device
when a device fails.
• Service backup configuration, which can implement real-time service backup between the two
devices. Real-time service backup is triggered when you add, modify, or delete service features.
This configuration guide only introduces the service backup configuration.
Complete the following tasks to configure stateful failover:
Task Remarks
Enabling stateful failover Required.
Enabling automatic configuration synchronization Required.
Configuring a failover interface and a backup VLAN Required.
Service module related configurations
Optional.
A device providing NAT, ALG, or blacklist services
automatically backs up related information to the
backup device after the configurations take effect.