Cisco 500 Series, Configuration Manual

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Cisco Security Appliance Command Line Configuration Guide
OL-12172-03
Chapter 5 Configuring Ethernet Settings, Redundant Interfaces, and Subinterfaces
Configuring a Redundant Interface
Caution
If you are using a physical interface already in your configuration, removing the name will clear any
configuration that refers to the interface.
•
The only configuration available to physical interfaces that are part of a redundant interface pair are
physical parameters (set in the
“Configuring and Enabling RJ-45 Interfaces” section on page 5-1 or
the “Configuring and Enabling Fiber Interfaces” section on page 5-3 ), the description command,
and the shutdown command. You can also enter run-time commands like default and help .
• If you shut down the active interface, then the standby interface becomes active.
Adding a Redundant Interface
You can configure up to 8 redundant interface pairs. To configure a redundant interface, perform the
following steps:
Step 1
To add the logical redundant interface, enter the following command:
hostname(config)#
interface redundant
number
hostname(config-if)#
where the number argument is an integer between 1 and 8.
Step 2
To add the first member interface to the redundant interface, enter the following command:
hostname(config-if)# member-interface
physical_interface
See the “Configuring and Enabling RJ-45 Interfaces” section for a description of the physical interface
ID.
After you add the interface, any configuration for it (such as an IP address) is removed.
Step 3 To add the second member interface to the redundant interface, enter the following command:
hostname(config-if)# member-interface physical_interface
Make sure the second interface is the same physical type as the first interface.
To remove a member interface, enter the no member-interface physical_interface command. You
cannot remove both member interfaces from the redundant interface; the redundant interface requires at
least one member interface.
Step 4
To enable the interface (if you previously disabled it), enter the following command:
hostname(config-if)# no shutdown
By default, the interface is enabled. To disable the interface, enter the shutdown command. If you enter
the shutdown command, you also shut down all subinterfaces. If you shut down an interface in the
system execution space, then that interface is shut down in all contexts that share it.
The following example creates two redundant interfaces:
hostname(config)# interface redundant 1
hostname(config-if)# member-interface gigabitethernet 0/0
hostname(config-if)# member-interface gigabitethernet 0/1
hostname(config-if)# interface redundant 2
hostname(config-if)# member-interface gigabitethernet 0/2
hostname(config-if)# member-interface gigabitethernet 0/3