CLI Reference Guide-R05

Chapter 12 | Link Aggregation Commands
Dynamic Configuration Commands
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lacp system-priority This command configures a port's LACP system priority. Use the no form to restore
the default setting.
Syntax
lacp {actor | partner} system-priority priority
no lacp {actor | partner} system-priority
actor - The local side an aggregate link.
partner - The remote side of an aggregate link.
priority - This priority is used to determine link aggregation group (LAG)
membership, and to identify this device to other switches during LAG
negotiations. (Range: 0-65535)
Default Setting
32768
Command Mode
Interface Configuration (Ethernet)
Command Usage
◆ Port must be configured with the same system priority to join the same LAG.
◆ System priority is combined with the switch’s MAC address to form the LAG
identifier. This identifier is used to indicate a specific LAG during LACP
negotiations with other systems.
◆ Once the remote side of a link has been established, LACP operational settings
are already in use on that side. Configuring LACP settings for the partner only
applies to its administrative state, not its operational state, and will only take
effect the next time an aggregate link is established with the partner.
◆ If the port channel admin key is set to a non-default value, the operational key
is based upon LACP PDUs received from the partner, and the channel admin
key is reset to the default value. The trunk identifier will also be changed by this
process.
Example
Console(config)#interface ethernet 1/5
Console(config-if)#lacp actor system-priority 3
Console(config-if)#