Configuring The Switch Priority - Cisco IE 3000 Software Configuration Manual

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Configuring MSTP

spanning-tree mst instance-id cost cost

show spanning-tree mst interface interface-id

show spanning-tree mst instance-id

copy running-config startup-config

The show spanning-tree mst interface interface-id privileged EXEC command displays information

only for ports that are in a link-up operative state. Otherwise, you can use the show running-config

privileged EXEC command to confirm the configuration.

To return the interface to its default setting, use the no spanning-tree mst instance-id cost interface

configuration command.

Configuring the Switch Priority

You can configure the switch priority and make it more likely that the switch will be chosen as the root

Exercise care when using this command. For most situations, we recommend that you use the

spanning-tree mst instance-id root primary and the spanning-tree mst instance-id root secondary

global configuration commands to modify the switch priority.

Configure the cost.

If a loop occurs, the MSTP uses the path cost when selecting an

interface to place into the forwarding state. A lower path cost

represents higher-speed transmission.

For instance-id, 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.

For cost, the range is 1 to 200000000; the default value is

derived from the media speed of the interface.

Return to privileged EXEC mode.

Verify your entries.

(Optional) Save your entries in the configuration file.

Cisco IE 3000 Switch Software Configuration Guide

Configuring MSTP Features

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