Lacp System-Priority - Cisco Catalyst 3650 series Command Reference Manual

lacp system-priority

lacp system-priority
To configure the system priority for the Link Aggregation Control Protocol (LACP), use the lacp
system-priority command in global configuration mode on the device. To return to the default setting, use
the no form of this command.
lacp system-priority priority
no lacp system-priority
Syntax Description
priority
Command Default
The default is 32768.
Command Modes
Global configuration
Command History
Release
Cisco IOS XE 3.3SECisco IOS XE 3.3SE
Usage Guidelines
The lacp system-priority command determines which device in an LACP link controls port priorities.
An LACP channel group can have up to 16 Ethernet ports of the same type. Up to eight ports can be active,
and up to eight ports can be in standby mode. When there are more than eight ports in an LACP channel group,
the device on the controlling end of the link uses port priorities to determine which ports are bundled into the
channel and which ports are put in hot-standby mode. Port priorities on the other device (the noncontrolling
end of the link) are ignored.
In priority comparisons, numerically lower values have a higher priority. Therefore, the system with the
numerically lower value (higher priority value) for LACP system priority becomes the controlling system. If
both devices have the same LACP system priority (for example, they are both configured with the default
setting of 32768), the LACP system ID (the device MAC address) determines which device is in control.
The lacp system-priority command applies to all LACP EtherChannels on the device.
Use the show etherchannel summary privileged EXEC command to see which ports are in the hot-standby
mode (denoted with an H port-state flag in the output display).
Examples This example shows how to set the LACP system priority:
Device(config)# lacp system-priority 20000
You can verify your settings by entering the show lacp sys-id privileged EXEC command.
Command Reference, Cisco IOS XE Everest 16.5.1a (Catalyst 3650 Switches)
312
System priority for LACP. The range is 1 to 65535.
Modification
This command was introduced.