JetStream 52-Port Gigabit Stackable L3 Managed Switch CLI Guide
Example
Enable the MST Instance 1 and configure its priority as 4096:
T3700G-52TQ(config)#spanning-tree mst instance 1 priority 4096
30.10 spanning-tree mst
Description
The spanning-tree mst command is used to configure MST Instance Port. To
return to the default configuration of the corresponding Instance Port, please
use no spanning-tree mst command. A port can play different roles in
different spanning tree instance. You can use this command to configure the
parameters of the ports in different instance IDs as well as view status of the
ports in the specified instance.
Syntax
spanning-tree mst instance
instance-id
{
[port-priority
priority
] [cost
cost
] }
no spanning-tree mst instance
instance-id
Parameter
instance-id
—— Instance ID, ranging from 1 to 8.
priority
—— Port Priority, which must be multiple of 16 ranging from 0 to 240.
By default, it is 128. Port Priority is an important criterion on determining if the
port will be chosen as the root port by the device connected to this port.
cost
—— Path Cost, ranging from 0 to 2000000. The lower value has the
higher priority. Its default value is 0 meaning “auto”.
Command Mode
Interface Configuration Mode (interface fastEthernet / interface range
fastEthernet / interface gigabitEthernet / interface range gigabitEthernet /
interface ten-gigabitEthernet / interface range ten-gigabitEthernet / interface
port-channel)
Example
Configure the priority of Gigabit Ethernet port 1/0/1 in MST Instance 1 as 64,
and path cost as 2000:
T3700G-52TQ(config)#interface gigabitEthernet 1/0/1
T3700G-52TQ(config-if)#spanning-tree mst instance 1 port-priority 64
cost 2000
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