Link Aggregation Commands 4

lacp

This command enables 802.3ad Link Aggregation Control Protocol (LACP) for the current interface. Use the no form to disable it.

Syntax

[no] lacp

Default Setting

Disabled

Command Mode

Interface Configuration (Ethernet Ports 1-8)

Command Usage

•The ports on both ends of an LACP trunk must be configured for full duplex, either by forced mode or auto-negotiation.

•A trunk formed with another switch using LACP will automatically be assigned the next available port-channel ID.

•If the target switch has also enabled LACP on the connected ports, the trunk will be activated automatically.

•If more than eight ports attached to the same target switch have LACP enabled, the additional ports will be placed in standby mode, and will only be enabled if one of the active links fails.

Example

The following shows LACP enabled on ports 6-8. 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 Trunk1 has been established.

Console(config)#interface ethernet 1/6

Console(config-if)#lacp

Console(config-if)#exit

Console(config)#interface ethernet 1/7

Console(config-if)#lacp

Console(config-if)#exit

Console(config)#interface ethernet 1/8

Console(config-if)#lacp

Console(config-if)#end

Console#show interfaces status port-channel 1

Information of Trunk 1

 

Basic

information:

 

Port

Type:

10G

Mac Address:

00-0C-DB-21-11-34

Configuration:

 

Name:

 

 

Port

admin:

Up

Speed-duplex:

10G full

Capabilities:

 

Port

security:

Disabled

Max MAC count:

0

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