Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) - Manual (Page 553)

Spanning Tree Commands
Software Reference for x310 Series Switches
C613-50046-01 REV A AlliedWare Plus TM Operating System - Version 5.4.4C 19.63
spanning-tree priority (bridge priority)
Use this command to set the bridge priority for the switch. A lower priority value indicates
a greater likelihood of the switch becoming the root bridge.
Use this command for RSTP, STP or MSTP. When MSTP mode is configured, this will apply
to the CIST.
Use the no variant of this command to reset it to the default.
Syntax spanning-tree priority <priority>
no spanning-tree priority
Default The default priority is 32678.
Mode Global Configuration
Usage To force a particular switch to become the root bridge use a lower value than other
switches in the spanning tree.
Example
Related Commands spanning-tree mst instance priority
show spanning-tree
Parameter Description
<priority> <0-61440> The bridge priority, which will be rounded to a multiple of
4096.
awplus# configure terminal
awplus(config)# spanning-tree priority 4096