Use this command to enable 802.3ad Link Aggregation Control Protocol (LACP)
for the current interface. Use the no form to disable it.
Syntax
lacp no lacp
Default Setting
Disabled
Command Mode
Interface Configuration (Ethernet)
Command Usage
Finish configuring port trunks before you connect the corresponding network
cables between switches.
You can configure up to six trunks. The maximum number of ports that can
be combined as a dynamic LACP trunk - PowerConnect 3248: 4 10/100 Mbps ports,
2 1000 Mbps ports; PowerConnect 5224: 6 1000 Mbps ports.
All ports in the same trunk must consist of the same media type (i.e., twisted-pair
or fiber).
The ports on both ends of trunk must be configured the same for speed and
flow control.
The ports on both ends of trunk must also be configured for full duplex,
either by forced mode or auto-negotiation.
If the target switch has also enabled LACP on the connected ports, the trunk
will be activated.
If more than four 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.
STP, VLAN and IGMP settings can only be made for the entire trunk via the
specified port-channel.
Any trunk formed with another switch using LACP will automatically be assigned
the next available port-channel ID.
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 Trunk1 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:
Port type: 100tx
Mac address: 00-00-e8-00-00-0b
Configuration:
Name:
Port admin status: Up
Speed-duplex: Auto
Capabilities: 10half, 10full, 100half, 100full,
Flow control status: Disabled
Port security: Disabled
Port security action: None
Current status:
Created by: lacp
Link status: Up
Operation speed-duplex: 100full
Flow control type: None
Member Ports: Eth1/11, Eth1/12, Eth1/13,
Console#
