Allied Telesis AT-S62 - Manual (Page 520)

Chapter 25: Tagged and Port-based Virtual LANs
Section V: Virtual LANs 520
Each VLAN has been assigned a unique VID. You assign this number
when you create a VLAN.
The ports have been assigned PVID values. The management software
automatically assigns the PVIDs when you create the VLAN. The PVID of
a port is the same as the VID to which the port is an untagged member.
In the example, each VLAN has one port connected to the router. The
router interconnects the various VLANs and functions as a gateway to
the WAN.