Cisco ASA Series Cli Configuration Manual page 432

Starting Interface Configuration (ASA 5510 and Higher)
Changing the Active Interface
By default, the active interface is the first interface listed in the configuration, if it is available. To view
which interface is active, enter the following command:
hostname# show interface redundantnumber detail | grep Member
For example:
hostname# show interface redundant1 detail | grep Member
To change the active interface, enter the following command:
hostname# redundant-interface redundantnumber active-member physical_interface
where the redundantnumber argument is the redundant interface ID, such as redundant1.
The physical_interface is the member interface ID that you want to be active.
Configuring an EtherChannel
This section describes how to create an EtherChannel port-channel interface, assign interfaces to the
EtherChannel, and customize the EtherChannel.
This section includes the following topics:
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Adding Interfaces to the EtherChannel
This section describes how to create an EtherChannel port-channel interface and assign interfaces to the
EtherChannel. By default, port-channel interfaces are enabled.
Guidelines and Limitations
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Prerequisites
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Cisco ASA Series CLI Configuration Guide
1-28
Members GigabitEthernet0/3(Active), GigabitEthernet0/2
Adding Interfaces to the EtherChannel, page 1-28
Customizing the EtherChannel, page 1-30
You can configure up to 48 EtherChannels.
Each channel group can have eight active interfaces. Note that you can assign up to 16 interfaces to
a channel group. While only eight interfaces can be active, the remaining interfaces can act as
standby links in case of interface failure.
You cannot use interfaces on the 4GE SSM, including the integrated 4GE SSM in slot 1 on the ASA
5550, as part of an EtherChannel.
To configure a spanned EtherChannel for clustering, see the
section on page 1-33 instead of this procedure.
See also the "EtherChannel Guidelines" section on page
All interfaces in the channel group must be the same type, speed, and duplex. Half duplex is not
supported.
You cannot add a physical interface to the channel group if you configured a name for it. You must
first remove the name using the no nameif command.
Chapter 1 Starting Interface Configuration (ASA 5510 and Higher)
"Configuring Spanned EtherChannels"
1-11.