I am using GNS3 and am trying to have only one vlan on the trunk. I did the command below and I got an error. Then I tried to remove the existing VLANs but it did not remove them from the vlan db. Any thoughts? Thx
sw2(config-if)#switchport trunk allowed vlan 255
Command rejected: Bad VLAN allowed list. You have to include all default vlans, e.g. 1-2,1002-1005.