Just began configuring a WS-CBS3130G-S today and have run into a problem with my port channels- can't get the interface to go into trunk mode.
Has anyone seen this before?
(config)#int po 20
Command rejected: Not a convertible port.
Any help/advice would be greatly appreciated!
No. You need to make it a switch port before you can make it a trunk.
int portchannel 1
No switchport means that the port is a layer 3 routed port. Trunking will not work on routed port. Also make sure that all ports that are part of the channel also make them a switch port as i describe above.