Allied Telesis AT-S83 - Manual (Page 260)

Chapter 13: Spanning Tree Protocol (STP) Commands
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SPANNING-TREE MST INSTANCE
Syntax
spanning-tree mst instance <1-15>
no spanning-tree mst instance
Parameters
instance Specifies priority for a particular instance. Choose a value
between 1 and 15.
Description
Use the SPANNING-TREE MST INSTANCE command to select a priority
for the specified instance. Use the no form of this command to disable a
priority for the specified instance.
Command Mode
Configuration Terminal mode
Example
The following commands select a priority of 4 for an instance:
switch#configure terminal
switch(config)#spanning-tree mst instance 4
Related Commands
none