Make sure the VLAN is defined: 

Then define the port: 

Sometimes the list of allowed vlans on a trunk interface can be very large.  IOS modifies this list such that each line is not too long with the vlan add phrase.  If you need to add additional vlans, put them ALL in a single command and enter them, or use the vlan add command.  This is demonstrated in the LAB: adding large strings of vlans.  

For this example, we want two physical cables to behave as one, and "share" bandwidth across both links. We do this with "etherchannel" or lacp.   

First Interface: 

You need to make sure that the allowed vlans always match.  If you modify one of the interfaces vlan lists, it will break the port channel.  To make modifications, do it to the port-channel ONLY.  It will update the bound interfaces automatically.    See: LAB: updating vlans on a port-channel