SMC Networks Understanding LACP System Priority and Configuration for Link Aggregation

Link Aggregation Commands 4

Example

The following shows LACP enabled on ports 11-13. Because LACP has also been enabled on the ports at the other end of the links, the show interfaces status port-channel 1 command shows that Trunk 1 has been established.

Console(config)#interface ethernet 1/11

Console(config-if)#lacp

Console(config-if)#exit

Console(config)#interface ethernet 1/12

Console(config-if)#lacp

Console(config-if)#exit

Console(config)#interface ethernet 1/13

Console(config-if)#lacp

Console(config-if)#exit

Console(config)#exit

Console#show interfaces status port-channel 1

Information of Trunk 1

Basic	information:	100TX
Port	type:
Mac address:		00-12-CF-12-34-72
Configuration:
Name:	admin:	Up
Port
Speed-duplex:		Auto
Capabilities:		10half, 10full, 100half, 100full
Flow	control status:	Disabled
Port	security:	Disabled
Max MAC count:		0
Current status:		LACP
Created by:
Link	status:	Up
Operation speed-duplex:		100full
Flow	control type:	None

Member Ports: Eth1/11, Eth1/12, Eth1/13,

Console#

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

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