Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) - Manual (Page 546)

Spanning Tree Commands
Software Reference for x310 Series Switches
19.56 AlliedWare Plus TM Operating System - Version 5.4.4C C613-50046-01 REV A
spanning-tree path-cost
Use this command in Interface Configuration mode for a switch port interface only to set
the cost of a path for the specified port. This value then combines with others along the
path to the root bridge in order to determine the total cost path value from the particular
port, to the root bridge. The lower the numeric value, the higher the priority of the path.
This applies when the port is the root port.
Use this command for RSTP, STP or MSTP. When MSTP mode is configured, this will apply
to the port’s path cost for the CIST.
Syntax spanning-tree path-cost <pathcost>
no spanning-tree path-cost
Default The default path cost values and the range of recommended path cost values depend on
the port speed, as shown in the following table from the IEEE 802.1q-2003 and IEEE
802.1d-2004 standards.
Mode Interface Configuration mode for switch port interface only.
Example
Parameter Description
<pathcost> <1-200000000> The cost to be assigned to the port.
Port speed Default path cost
Recommended path cost
range
Less than 100 Kb/s
1Mbps
10Mbps
100 Mbps
1 Gbps
10 Gbps
100 Gbps
1Tbps
10 Tbps 200,000,000
20,000,000
2,000,000
200,000
20,000
2,000
200
20
2 20,000,000-200,000,000
2,000,000-20,000,000
200,000-2,000,000
20,000-200,000
2,000-20,000
200-2, 000
20-200
2-200
2-20
awplus# configure terminal
awplus(config)# interface port1.0.2
awplus(config-if)# spanning-tree path-cost 123