Let's see how looks like assignment of a different ports to a VLAN:
vlan 100
no untagged 10,19-20
untagged 11-18,21-24
tagged Trk1-Trk3
ip address X.X.X.X 255.255.255.248
Previous commands have the following meaning:
no untagged 10,19-20 - these ports do NOT pass the traffic of this VLAN;
untagged 11-18,21-24 - these ports pass the traffic without 802.1q tags;
tagged Trk1-Trk3 - traffic is tagged with 802.1q headers.
"no untagged" command is just makes my head spinning. :)
