Spanning-Tree Mst Cost - Cisco Catalyst 3750 Command Reference Manual

spanning-tree mst cost

spanning-tree mst cost
Use the spanning-tree mst cost interface configuration command on the switch stack or on a standalone
switch to set the path cost for multiple spanning-tree (MST) calculations. If a loop occurs, spanning tree
considers the path cost when selecting an interface to put in the forwarding state. Use the no form of this
command to return to the default setting.
Syntax Description instance-id
cost
Defaults
The default path cost is computed from the interface bandwidth setting. These are the IEEE default path
cost values:
•
•
•
Command Modes Interface configuration
Command History Release
12.1(14)EA1
Usage Guidelines
When you configure the cost, higher values represent higher costs.
Examples
This example shows how to set a path cost of 250 on a port associated with instances 2 and 4:
Switch(config)# interface gigabitethernet1/0/2
Switch(config-if)# spanning-tree mst 2,4 cost 250
You can verify your settings by entering the show spanning-tree mst interface interface-id privileged
EXEC command.
Catalyst 3750 Switch Command Reference
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spanning-tree mst instance-id cost cost
no spanning-tree mst instance-id cost
Range of spanning-tree instances. You can specify a single instance, a range of
instances separated by a hyphen, or a series of instances separated by a comma. The
range is 0 to 15.
Path cost is 1 to 200000000, with higher values meaning higher costs.
1000 Mbps—20000
100 Mbps—200000
10 Mbps—2000000
Modification
This command was introduced.
Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
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