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Cisco ME 3800X and ME 3600X Switch Command Reference
OL-28238-01
Chapter
spanning-tree mst cost
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.
spanning-tree mst instance-id cost cost
no spanning-tree mst instance-id cost
Syntax Description
Defaults The default path cost is computed from the interface speed. Faster speeds have smaller costs.
• 10 Gb/s—2000
• 1000 Mb/s—20000
• 100 Mb/s—200000
• 10 Mbp\/s—2000000
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.
Examples 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
instance-id 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.
cost Path cost is 1 to 200000000, with higher values meaning higher costs.
Release Modification
12.2(52)EY This command was introduced.
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