PLANET WGSW-50040 - Manual (Page 166)

<instance-id> cost” restores the default setting.
Parameter:
<instance-id> sets the instance ID. The valid range is from 0 to 64.
<cost> sets path cost. The valid range is from 1 to 200,000,000.
Command mode:
Port Mode
Default:
By default, the port cost is relevant to the port bandwidth.
Port Type Default Path Cost Suggested Range
10Mbps 2000000 2000000~20000000
100Mbps 200000 200000~2000000
1Gbps 20000 20000~200000
10Gbps 2000 2000~20000
For the aggregation ports, the default costs are as below:
Port Type Allowed Number Of Aggregation Ports Default Port Cost
10Mbps N 2000000/N
100Mbps N 200000/N
1Gbps N 20000/N
10Gbps N 2000/N
Usage Guide:
By setting the port cost, users can control the cost from the current port to the root bridge in order to
control the elections of root port and the designated port of the instance.
Example:
On the port1/2, set the MSTP port cost in the instance 2 to 3000000.
Switch(Config-If-Ethernet1/2)#spanning-tree mst 2 cost 3000000
9.1.16 spanning-tree mst port-priority
Command:
spanning-tree mst <instance-id> port-priority <port-priority>
no spanning-tree mst <instance-id> port-priority
Function:
Set the current port priority for the specified instance; the command “no spanning-tree mst
<instance-id> port-priority” restores the default setting.
Parameter:
<instance-id> sets the instance ID. The valid range is from 0 to 64;
<port-priority> sets port priority. The valid range is from 0 to 240. The value should be the multiples