12-26
Cisco ASA 5500 Series Configuration Guide using ASDM
Chapter12 Starting Interface Configuration (ASA 5510 and Hig her)
Starting Interface Configuration (ASA 5510 and Higher)
Note Only flow control frames defined in 802.3x are supported. Priority-based flow control is not
supported.
e. Click OK to accept the Hardware Properties changes.
Step6 Click OK to accept the Interface changes.
What to Do Next
Optional Tasks:
•Configure redundant interface pairs. See the “Configuring a Redundant Interface” section on
page 12-26.
•Configure an EtherChannel. See the “Configuring an EtherChannel” section on page 12-29.
•Configure VLAN subinterfaces. See the “Configuring VLAN Subinterfaces and 802.1Q Trunking”
section on page 12-35.
Required Tasks:
•For multiple context mode, assign interfaces to contexts and automatically assign unique MAC
addresses to context interfaces. See the “Configuring Multiple Contexts” section on page11-14.
•For single context mode, complete the interface configuration. See Chapter14, “Completing
Interface Configuration (RoutedMode),” or Chapter 15, “Completing Interface Configuration
(TransparentMode, 8.4 and Later).”
Configuring a Redundant Interface
A logical redundant interface consists of a pair of physical interfaces: an active and a standby interface.
When the active interface fails, the standby interface becomes active and starts passing traffic. You can
configure a redundant interface to increase the ASA reliability. This feature is separate from device-level
failover, but you can configure redundant interfaces as well as failover if desired.
This section describes how to configure redundant interfaces and includes the following topics:
•Configuring a Redundant Interface, page 12-26
•Changing the Active Interface, page12-29

Configuring a Redundant Interface

This section describes how to create a redundant interface. By default, redundant interfaces are enabled.
Guidelines and Limitations
•You can configure up to 8 redundant interface pairs.
•Redundant interface delay values are configurable, but by default the ASA inherits the default delay
values based on the physical type of its member interfaces.
•See also the “Redundant Interface Guidelines” section on page12-10.