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Cisco ASA 5500 Series Configuration Guide using ASDM
Chapter 12 Starting Interface Configuration (ASA 5510 and Higher)
Starting Interface Configuration (ASA 5510 and Higher)
Note In single mode, this procedure only covers a subset of the parameters on the Edit Interface dialog
box; to configure other parameters, see Chapter 14, “Completing Interface Configuration
(Routed Mode),” or Chapter 15, “Completing Interface Configuration (Transparent Mode, 8.4
and Later).” Note that in multiple context mode, before you complete your interface
configuration, you need to allocate interfaces to contexts. See the “Configuring Multiple
Contexts” section on page 11-14.
Step 3 From the Hardware Port drop-down list, choose the physical, redundant, or port-channel interface to
which you want to add the subinterface.
Step 4 If the interface is not already enabled, check the Enable Interface check box.
The interface is enabled by default. To disable it, uncheck the check box.
Step 5 In the VLAN ID field, enter the VLAN ID between 1 and 4095.
Some VLAN IDs might be reserved on connected switches, so check the switch documentation for more
information. For multiple context mode, you can only set the VLAN in the system configuration.
Step 6 In the Subinterface ID field, enter the subinterface ID as an integer between 1 and 4294967293.
The number of subinterfaces allowed depends on your platform. You cannot change the ID after you set
it.
Step 7 (Optional) In the Description field, enter a description for this interface.
The description can be up to 240 characters on a single line, without carriage returns. For multiple
context mode, the system description is independent of the context description. In the case of a failover
or state link, the description is fixed as “LAN Failover Interface,” “STATE Failover Interface,” or
“LAN/STATE Failover Interface,” for example. You cannot edit this description. The fixed description
overwrites any description you enter here if you make this interface a failover or state link.
Step 8 Click OK.