Allied Telesis AT-DC2552XS - Manual (Page 374)

Chapter 14: STP Commands
374 Section II: Layer 2 Switching
SPANNING-TREE MST INSTANCE PATH-COST
Syntax
spanning-tree mst instance mst-instance path-cost path-cost
Parameters
mst-instance
Specifies the ID of an existing MST instance. The range is 1 to 15.
path-cost
Specifies the cost of a port to the root bridge of the MST instance.
The range is 1 to 200,000,000. By default, the path costs are 2000
for 10Gbps ports and 1400 for 40Gbps ports.
Mode
Port Interface mode
Description
Use this command to specify the cost of a port to the root bridge of the
MST instance. This cost is combined with the costs of the other ports in
the path to the root bridge, to determine the total path cost. A lower path
cost gives the port a higher priority.
Note
This command is applicable only when MSTP is enabled.
To restores the default path cost, use the NO SPANNING-TREE MST
INSTANCE PATH-COST command.
Confirmation Command
“SHOW SPANNING-TREE” on page 344
Example
This example assigns a port cost of 500 for MST instance 2 on port 1.0.2:
awplus> enable
awplus# configure terminal
awplus(config)# interface port1.0.2
awplus(config-if)# spanning-tree mst instance 2 path-cost
500