Allied Telesis AT-S63 - Manual (Page 202)

Chapter 17: STP Commands
202
Examples
The following command sets the switch’s bridge priority value to 45,056
(increment 11):
set stp priority=11
The following command sets the hello time to 7 seconds and the
forwarding delay to 25 seconds:
set stp hellotime=7 forwarddelay=25
The following command returns all STP parameters on the switch to the
default values:
set stp default