Allied Telesis AT-S63 - Manual (Page 325)

AT-S63 Management Software Web Browser User’s Guide
Secton V: Virtual LANs 325
6. Click Apply. The new mode is automatically activated on the switch.
Note
If your management session loses connectivity to the switch, wait for
the console timer to expire on your interrupted remote management
session and then use a local management session to continue
managing the unit. The default for the console timer is 10 minutes.