3com MSR 20-20 참조 매뉴얼

C

HAPTER

 38: MSTP C

ONFIGURATION

 C

OMMANDS

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If you set instance-id to 0, you are setting the priority of the port in the CIST. 
The priority of a port can affect the role selection of the port in the specified 
MST instance.

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Setting different priorities for the same port in different MST instances allows 
different VLAN traffic flows to be forwarded along different physical links, thus 
to enable per-VLAN load balancing.

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When the priority of a port is changed, MSTP will re-compute the role of the 
port and initiate a state transition.

■

If you do not provide instance instance-id, your configuration will take effect 
in the CIST instance only.

# Set the priority of port Ethernet 1/3 in MST instance 2 to 16.

<Sysname> system-view

[Sysname] interface Ethernet 1/3

[Sysname-Ethernet1/3] stp instance 2 port priority 16 

stp [ instance instance-id ] priority priority

undo stp [ instance instance-id ] priority

System view

instance instance-id: Sets the priority of the current port(s) in a particular 
spanning tree instance. The minimum value of instance-id is 0, representing the 
CIST, and the maximum value of instance-id is 15.

priority: Port priority, in the range of 0 to 61440 at the step of 4096, namely you 
can set up to 16 priority values, such as 0, 4096, 8192..., on the device.

Use the stp priority command to set the priority of the device.

Use the undo stp priority command to restore the device priority to the default 
setting.

By default, the device priority is 32768.

The device priority is involved in spanning tree computing. The device priority is set 
on a per-instance basis. An MSTP-compliant device can have different priorities in 
different MST instances.

If you do not provide instance instance-id, your configuration will take effect in 
the CIST instance only.

# Set the device priority in MST instance 1 to 4096.

<Sysname> system-view

[Sysname] stp instance 1 priority 4096