Operation Manual - STP
Quidway S3000 Series Ethernet Switches Chapter 1 RSTP Configuration
1-15
Table1-12 Set path cost of the specified port
Operation Command
Set path cost of the specified port stp cost cost
Restore the default path cost of the specified port undo stp cost
The path cost of Ethernet port is related to its link speed. The higher the link speed is,
the lower the path cost should be configured. RSTP can automatically detect the link
speed on the current Ethernet port and convert it to the corresponding path cost. Note
that configuring path cost of an Ethernet port will cause the recalculation of the
spanning tree. It is recommended to use the default value and let RSTP calculate the
path cost on the current Ethernet port.
By default, the bridge gets the path cost of a port according to the link speed directly.
1.2.13 Set the Priority of a Specified Port
The port priority is an important basis to decide if the port can be a root port. In the
calculation of the spanning tree, the port with the highest priority will be selected as the
root assuming all other conditions are the same.
You can use the following command to set the priority of a specified port.
Perform the following configurations in Ethernet port view.
Table1-13 Set the priority of a specified port
Operation Command
Set the priority of a specified port stp port priority port-priority
Restore the default priority of the specified port undo stp port priority
By setting the priority of an Ethernet port, you can put a specified Ethernet port into the
final spanning tree. Generally, the lower the value is set, the higher priority the port has
and the more likely it is for this Ethernet port to be included in the spanning tree. If all
the Ethernet ports of the bridge adopt the same priority parameter value, then the
priority of these ports depends on the Ethernet port index number. Note that changing
the priority of Ethernet port will cause recalculation of the spanning tree. You can set
the port priority at the time when setting up the networking requirements.
By default, priorities of all the Ethernet ports are 128.
1.2.14 Configure a Specified Port to be Connected to Point-to-Point Link
Generally, a point-to-point link connects the switches.
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