Cisco 7604 Configuration Guide - Page 278
Configuring Optional Active/Standby Failover Settings, Configuring Failover Preemption
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Configuring Failover Chapter 14 Configuring Failover Step 2 (Optional) Designate this unit as the secondary unit: hostname(config)# failover lan unit secondary Note This step is optional because by default units are designated as secondary unless previously configured. Step 3 Step 4 Step 5 (Optional) Specify different hostnames for the primary and secondary FWSMs to replace the default hostname "FWSM" that is assigned to both units. hostname(config)# hostname primary-hostname hostname(config)# hostname secondary secondary-hostname Enable failover: hostname(config)# failover After you enable failover, the active unit sends the configuration in running memory to the standby unit. As the configuration synchronizes, the messages "Beginning configuration replication: Sending to mate" and "End Configuration Replication to mate" appear on the active unit console. After the running configuration has completed replication, save the configuration to Flash memory: hostname(config)# write memory Configuring Optional Active/Standby Failover Settings You can configure the following optional Active/Standby failover setting when you are initially configuring failover or after failover has already been configured. Unless otherwise noted, the commands should be entered on the active unit. This section includes the following topics: • Configuring Failover Preemption, page 14-24 • Enabling HTTP Replication with Stateful Failover, page 14-25 • Configuring Interface and Unit Poll Times, page 14-25 • Configuring Failover Criteria, page 14-25 Configuring Failover Preemption When the primary unit in an Active/Standby failover configuration fails, or if the secondary unit boots before the primary unit, the secondary, standby unit becomes active. When the failover condition is resolved on the primary unit, it boots to the standby state by default and the secondary unit remains in the active state. You can use the failover preempt command to cause the primary unit to become the active unit automatically after a specified amount of time. Enter the following command to configure preemption for the primary unit: hostname(config)# failover preempt [delay] The delay is the wait time, in seconds, before the secondary unit is preempted. Valid values are from 1 to 1200 seconds. If the delay is not specified, there is no delay. When the primary unit becomes active, the secondary unit enters the standby state. 14-24 Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM OL-20748-01
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