Allied Telesis AT-S39 - Manual (Page 102)

Chapter 11: Spanning Tree Protocol Commands
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participate Activates and deactivates STP on the port. If you select
Yes, which is the default, the port will participate in
the spanning tree. If you select No, the port will
continue to receive and transmit Ethernet frames, but
will not participate in spanning tree.
Note
A port that is not participating in spanning tree is immediately
placed in the forwarding state. It cannot be placed in the blocking
state by STP should there be a loop in the network topology.
Consequently, it is incumbent on the network administrator to
insure that no loop will develop should STP be disabled on a port.
Description
This command is used to set the following STP port parameter settings:
❑ Port cost
❑ Port priority
❑ Fast mode
Examples
The following command sets the port cost to 15 and port priority to 100
for Port 6:
set stp port=6 portcost=15 portpriority=100
The following command activates fast mode on Port 10:
set stp port=10 fastmode=enable