Port Channels (Ether Channels)

This is to configure port channels (link aggregation) on Cisco switches.

1) Create the virtual port channel:

interface Port-channel2
 description Server1
 switchport trunk encapsulation dot1q
 switchport mode trunk
 switchport nonegotiate
 spanning-tree portfast trunk

2) On each physical switch interface, include it as part of the group.

interface GigabitEthernet2/0/1
 description Server1 port 1
 switchport trunk encapsulation dot1q
 switchport mode trunk
 switchport nonegotiate
 spanning-tree portfast trunk
 channel-group 2 mode active

interface GigabitEthernet2/0/2
 description Server1 port 2
 switchport trunk encapsulation dot1q
 switchport mode trunk
 switchport nonegotiate
 spanning-tree portfast trunk
 channel-group 2 mode active

interface GigabitEthernet2/0/3
 description Server1 port 3
 switchport trunk encapsulation dot1q
 switchport mode trunk
 switchport nonegotiate
 spanning-tree portfast trunk
 channel-group 2 mode active