EtherChannel Configuration

Core Switch
=========

Switch>enble
Switch#configure terminal
Switch(config)#hostname Core
Core(config)#no ip domain-lookup

Core(config)#vtp mode server
Core(config)#vtp domain example

Core(config)#vlan 10
Core(config-vlan)#name vlan10
Core(config-vlan)#exit

Core(config)#vlan 20
Core(config-vlan)#name vlan20
Core(config-vlan)#exit

Core(config)#interface range fastethernet 0/1 - 4
Core(config-if-range)#switchport trunk encapsulation dot1q
Core(config-if-range)#switchport mode trunk
Core(config-if-range)#exit

Core(config)#interface range fastethernet 0/1 - 2
Core(config-if-range)#channel-group 1 mode desirable
Core(config-if-range)#exit

Core(config)#interface range fastethernet 0/3 - 4
Core(config-if-range)#channel-group 2 mode desirable

Core(config-if-range)#exit
Core(config)#exit
Core#copy running-config startup-config

Switch 1
======

Switch>enable
Switch#configure terminal
Switch(config)#hostname Switch1
Switch1(config)#no ip domain-lookup
Switch1(config)#vtp mode client
Switch1(config)#vtp domain example
Switch1(config)#interface range fastethernet 0/5 - 10
Switch1(config-if-range)#switchport mode access
Switch1(config-if-range)#switchport access vlan 10
Switch1(config-if-range)#exit

Switch1(config)#interface range fastethernet 0/11 - 20
Switch1(config-if-range)#switchport mode access
Switch1(config-if-range)#switchport access vlan 20
Switch1(config-if-range)#exit

Switch1(config)#interface range f0/1 - 2
Switch1(config-if-range)#switchport mode trunk
Switch1(config-if-range)#channel-group 1 mode desirable
Switch1(config-if-range)#exit
Switch1(config)#exit
Switch1#copy running-config startup-config

Switch 2
======
Switch>enable
Switch#configure terminal
Switch(config)#hostname Switch2
Switch2(config)#no ip domain-lookup
Switch2(config)#vtp mode client
Switch2(config)#vtp domain example

Switch2(config)#interface range fastethernet 0/5 - 10
Switch2(config-if-range)#switchport mode access
Switch2(config-if-range)#switchport access vlan 10
Switch2(config-if-range)#exit

Switch2(config)#interface range fastethernet 0/11 - 20
Switch2(config-if-range)#switchport mode access
Switch2(config-if-range)#switchport access vlan 20
Switch2(config-if-range)#exit

witch2(config)#interface range fastethernet 0/1 - 2
Switch2(config-if-range)switchport mode trunk
Switch2(config-if-range)channel-group 1 mode desirable
Switch1(config-if-range)#exit
Switch1(config)#exit
Switch1#copy running-config startup-config

Verifying EtherChannel
=================

Switch#show running-config
Switch#show running-config interface fastethernet 0/12
Switch#show etherchannel
Switch#show etherchannel 1 port-channel
Switch#show etherchannel summary
Switch#show interface port-channel 1
Switch#show pagp neighbor
Switch#clear pagp 1 counters
Switch#clear lacp 1 counters