Spanning-Tree Mst Cost - Cisco ME 3800X Command Reference Manual

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spanning-tree mst cost

To set the path cost for multiple spanning-tree (MST) calculations, use the spanning-tree mst cost

command in interface configuration mode. If a loop occurs, spanning tree considers the path cost when

selecting an interface to put in the forwarding state. To return to the default setting, use the no form of

this command.

Syntax Description

The default path cost is computed from the interface speed. Faster speeds have smaller costs.

Command Modes

Interface configuration

Command History

Usage Guidelines

When you configure the cost, higher values represent higher costs.

You can verify your settings by entering the show spanning-tree mst interface interface-id privileged

EXEC command.

This example shows how to set a path cost of 250 on a port associated with instances 2 and 4:

Switch(config)# interface gigabitethernet0/2

Switch(config-if)# spanning-tree mst 2,4 cost 250

Cisco ME 3800X and ME 3600X Switch Command Reference

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 4094.

Path cost is 1 to 200000000, with higher values meaning higher costs.

10 Gb/s—2000

1000 Mb/s—20000

100 Mb/s—200000

10 Mbp\/s—2000000

Modification

This command was introduced.