Allied Telesis AT-S63 - Manual (Page 498)

Chapter 28: Port-based, Tagged, and Multiple Mode VLAN Commands
498 Section VI: Virtual LANs
create vlan=Service vid=16 untaggedports=1,4,5-7
taggedports=11-12
The advantage of Syntax 2 over Syntax 1 is that you can create VLANs
containing both types of ports with one rather than two commands.