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DES-7200 Configuration Guide Chapter 10 MSTP Configuration
10-25
Command Function
DES-7200# copy running-config
startup-config
Save the configuration.
To restore the switch priority to the default value, use the no spanning-tree mst
instance-id priority command in the global configuration mode.
10.3.5 Configuring
Port Priority
When two ports are connected to the shared media, the device will set the one
of the higher priority (or smaller value) to be the forwarding status and the one
of the lower priority (or larger value) to be the discarding status.If the two ports
are of the same priority, the device will set the one with the smaller port number
to the forwarding status. You can assign different port priorities to various
instances on one port, by which various instances can run the separated
spanning tree protocols.
Same as device priority, it has 16 values, all a multiple of 16. They are 0, 16, 32,
48, 64, 80, 96, 112, 128, 144, 160, 176, 192, 208, 224, and 240 respectively.
The default value is 128.
To configure a port priority, execute the following commands in the privileged
mode:
Command Function
DES-7200# configure terminal
Enter the global configuration mode.
DES-7200(config)# interface
interface-id
Enter the interface configuration mode. A
legal interface contains a physical port and
an aggregate Link.
DES-7200(config-if)# spanning-tree
[mst instance-id] port-priority priority
Configure different priorities for different
instances. The command without the
instance-id parameter will configure a port
priority for instance 0.
instance-id: Interface ID in the range of 0
to 64.
priority: Port priority of an instance in the
range 0 to 240. Furthermore, it is
increased by the integral multiple of 16,
128 by default.
DES-7200(config-if)# end
Return to the privileged EXEC mode.
DES-7200# show spanning-tree [mst
instance-id] interface interface-id
Verify the configuration.