Allied Telesis AT-S81 - Manual (Page 245)

AT-S81 Management Software User’s Guide
Section II: Web Browser Interface 245
2. Click the PVID field of the port whose value you want to change and
enter the new PVID value for the port. The PVID must be equal to the
VID of the VLAN where you want the port to be an untagged member.
For example, to make Port 10 an untagged member of a VLAN that
has a VID of 12, you would change its PVID to 12.
Note
If you specify a PVID that does not correspond to any VIDs on the
switch, the management software creates a new VLAN with a VID
that equals the PVID. The VLAN is not assigned any name.
3. Click Apply.
4. Repeat steps 2 and 3 to change the PVID values of other ports.