| 13.2 |  | Serial Cable Failover Configuration |
| 13.2.2 |  | Steps 1- 4 configuring serial cable failover |

1. Cabling the firewalls - After verifying that the secondary PIX Security Appliance is powered off, attach a network cable between the primary and secondary firewalls for each network interface that will be used. If stateful failover is planned, one of the fast Ethernet interfaces must be reserved .
2. Connecting the failover cable - Connect the failover cable to the primary PIX Security Appliance, ensuring that the end of the cable labeled PRIMARY attaches to the primary firewall and that the end labeled SECONDARY connects to the secondary firewall. Do not power on the secondary firewall yet .
3. Configuring the primary PIX Security Appliance - Once the PIX Security Appliances are cabled correctly, it is then necessary to configure a number of parameters on the primary firewall. These parameters include the following:

1. Interface names and security levels, namif command
2. Interface speeds, interface command
3. Interface IP addresses, ip address command
4. Time, clock set command
5. Maximum transmission unit size, mtu command, optional for stateful failover
6. Failover IP addresses, failover ip address command
7. Stateful failover interface failover link command, optional for stateful failover
8. Failover poll time, failover poll command, optional for stateful failover

4. Powering on the secondary PIX Security Appliance - Turn on the power to the secondary PIX Security Appliance . As soon as the secondary firewall starts, the primary firewall recognizes it and starts synchronizing the configurations. As the configurations synchronize, the following messages appear:

   > Sync Started
   > Sync Completed

Demonstration activity 13.2.2 looks at the process of configuring the primary PIX Security Appliance for serial cable failover in much greater detail. The Command Reference looks at the failover commands and their syntaxes in greater detail.

| Lab Activity e-Lab Activity: failover Commands In this activity, the student will enable failover, setup IP addresses for the standby unit, set up stateful failover, and set the active unit.

| Media Activity Demonstration Activity: Configuring the Primary PIX Security Appliance for Serial Cable Failover In this activity, students will learn to configure the primary PIX Security Appliance for serial cable failover.