C
HAPTER
28
| Link Aggregation Commands
Dynamic Configuration Commands
– 1011 –
DEFAULT SETTING
0
COMMAND MODE
Interface Configuration (Port Channel)
COMMAND USAGE
â—† 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).
â—† 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), this
key is set to the same value as the port admin key (lacp admin key -
Ethernet Interface) used by the interfaces that joined the group. 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). Use the no form to restore the default setting.
SYNTAX
lacp timeout {long | short}
no lacp timeout
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
â—† 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.
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