CLI Reference Guide-R01

Chapter 12 | Link Aggregation Commands
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Default Setting
None
Command Mode
Interface Configuration (Port Channel)
Command Usage
◆ Ports are only allowed to join the same LAG if (1) the LACP system priority
matches, (2) the LACP port admin key matches, and (3) the LACP port channel
key matches (if configured).
◆ If the port channel admin key (lacp admin key - Port Channel) is not set when a
channel group is formed (i.e., it has the null value of 0), the operational key is
set to the same value as the operational key of the first member port. Note that
when the LAG is no longer used, the port channel admin key is reset to 0.
Example
Console(config)#interface port-channel 1
Console(config-if)#lacp admin-key 3
Console(config-if)#
lacp timeout This command configures the timeout to wait for the next LACP data unit
(LACPDU).
Syntax
lacp timeout {long | short}
long - Specifies a slow timeout of 90 seconds.
short - Specifies a fast timeout of 3 seconds.
Default Setting
long
Command Mode
Interface Configuration (Port Channel)
Command Usage
◆ The timeout configured by this command is set in the LACP timeout bit of the
Actor State field in transmitted LACPDUs. When the partner switch receives an
LACPDU set with a short timeout from the actor switch, the partner adjusts the
transmit LACPDU interval to 1 second. When it receives an LACPDU set with a
long timeout from the actor, it adjusts the transmit LACPDU interval to 30
seconds.
◆ If the actor does not receive an LACPDU from its partner before the configured
timeout expires, the partner port information will be deleted from the LACP
group.