I have a cisco 2950 series catalyst switch. I setup port fa0/23 - 24 to be an ether-channel and a trunk, with the ether-channel being named Port-channel1.
I want to configure the trunk to use dot1q encapsulation. So, under Port-channel1 configuration i try to enter the command "switchport trunk encapsulation dot1q", and it doesn't take. In fact, here's what shows up when I use the help function:
Switch(config-if)#switchport trunk ?
allowed Set allowed VLAN characteristics when interface is in trunking mode
native Set trunking native characteristics when interface is in trunking mode
pruning Set pruning VLAN characteristics when interface is in trunking mode
Notice there is no "encapsulation" option.
So, can 2950's change encapsulatioin or do they always use ISL? If so, how can I change it?