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Cisco Security Appliance Command Line Configuration Guide
OL-10088-01
Chapter 14 Configuring Failover
Configuring Failover
Step 2 Define the failover interface. Use the same settings as you used for the primary unit.
a. Specify the interface to be used as the failover interface:
hostname(config)# failover lan interface if_name phy_if
The if_name argument assigns a name to the interface specified by the phy_if argument.
b. Assign the active and standby IP address to the failover link:
hostname(config)# failover interface ip if_name ip_addr mask standby ip_addr
Note Enter this command exactly as you entered it on the primary unit when you configured the
failover interface on the primary unit.
c. Enable the interface:
hostname(config)# interface phy_if
hostname(config-if)# no shutdown
Step 3 (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 4 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.
Step 5 After the running configuration has completed replication, save the configuration to Flash memory:
hostname(config)# copy running-config startup-config
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:
• Enabling HTTP Replication with Stateful Failover, page 14-24
• Disabling and Enabling Interface Monitoring, page 14-24
• Configuring Interface Health Monitoring, page 14-24
• Configuring Failover Criteria, page 14-25
• Configuring Virtual MAC Addresses, page 14-25
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