Cisco Systems ASA5515K9, ASA 5500 - page 270

6-28
Cisco ASA 5500 Series Configuration Guide using the CLI
Chapter6 Starting Interface Configuration (ASA 5510 a nd Higher)
Starting Interface Configuration (ASA 5510 and Higher)
Caution If you are using a physical interface already in your configuration, removing the name will clear any
configuration that refers to the interface.
Detailed Steps
Command Purpose
Step1 interface physical_interface
Example:
hostname(config)# interface
gigabitethernet 0/0
Specifies the interface you want to add to the channel group,
where the physical_interface ID includes the type, slot, and port
number as type[slot/]port. This first interface in the channel group
determines the type and speed for all other interfaces in the group.
In transparent mode, if you create a channel group with multiple
Management interfaces, then you can use this EtherChannel as the
management-only interface.
Step2 channel-group channel_id mode {active |
passive | on}
Example:
hostname(config-if)# channel-group 1 mode
active
Assigns this physical interface to an EtherChannel with the
channel_id between 1 and 48. If the port-channel interface for this
channel ID does not yet exist in the configuration, one will be
added:
interface port-channel channel_id
We recommend using active mode. For information about active,
passive, and on modes, see the “Link Aggregation Control
Protocol” section on page 6-6.
Step3 (Optional)
lacp port-priority number
Example:
hostname(config-if)# lacp port-priority
12345
Sets the priority for a physical interface in the channel group
between 1 and 65535. The default is 32768. The higher the
number, the lower the priority. The ASA uses this setting to decide
which interfaces are active and which are standby if you assign
more interfaces than can be used. If the port priority setting is the
same for all interfaces, then the priority is determined by the
interface ID (slot/port). The lowest interfaceID is the highest
priority. For example, GigabitEthernet0/0 is a higher priority
than GigabitEthernet 0/1.
If you want to prioritize an interface to be active even though it
has a higher interface ID, then set this command to have a lower
value. For example, to make GigabitEthernet 1/3 active before
GigabitEthernet 0/7, then make the lacp port-priority value be
12345 on the 1/3 interface vs. the default 32768 on the 0/7
interface.
If the device at the other end of the EtherChannel has conflicting
port priorities, the system priority is used to determine which port
priorities to use. See the lacp system-priority command in the
“Customizing the EtherChannel” section on page 6-29.
Step4 Repeat steps 1 through 5 for each interface you
want to add to the channel group.
Each interface in the channel group must be the same type and
speed. Half duplex is not supported. If you add an interface that
does not match, it will be placed in a suspended state.