LACP (Link agregation control protocol)
configuration LACP
Switch(config)#interface range fa 0/1-2
Switch(config-if-range)# channel group 1 mode active
Switch(config-if-range)# exit
Switch(config)#interface port-channel 1
Switch(config-if)#switch port mode trunk
Switch(config-if)#switch port trunk allowed vlan 10,20
Depannage LACP
Switch#show etherchannel summry