Allied Telesis AT-S63 - Manual (Page 558)

Chapter 23: Port-based and Tagged VLANs
558 Section V: VLANs
General Rules for
Creating a
Tagged VLAN
Below is a summary of the rules to observe when you create a tagged
VLAN.
ˆ Each tagged VLAN must be assigned a unique VID. If a particular
VLAN spans multiple switches, each part of the VLAN on the different
switches must be assigned the same VID.
ˆ A tagged port can be a member of multiple VLANs.
ˆ An untagged port can be an untagged member of only one VLAN at a
time.
ˆ An AT-9400 Series switch can support up to 4094 tagged VLANS.