Allied Telesis AT-S63 - Manual (Page 354)

Chapter 21: Port-based and Tagged VLANs
354 Secton V: Virtual LANs
5. If you select one of the multiple VLAN modes, specify an uplink port in
the Uplink Port field. This port functions as the uplink port for the
VLANs. The default is port 1.
6. Click Apply.
The new mode is automatically activated on the switch.
7. From the Configuration menu, select the Save Config option to
permanently save your changes. (This option is not displayed if there
are no changes to save.)