Hi,
lets say you would like to add ports 1 to 10 on a stand alone switch then try:
configure vlan data add port 1-10 untagged
configure vlan voip add port 1-10 tagged
and if it's a stack and you want to add port 5-10 from unit 2 then it should be:
configure vlan data add port 2:5-10 untagged
configure vlan voip add port 2:5-10 tagged
I'm not a EXOS specialist but the first part is working on my stand alone X460.
Regrads,
Axel