Configuring The Switch Priority - Cisco 7604 Configuration Manual

Chapter 19 Configuring Standard-Compliant IEEE MST
Command
Step 3
Router(config-if)# spanning-tree mst instance_id
cost cost
Step 4
Router(config-if)# end
Step 5
Router# show spanning-tree mst interface
interface_id
or
Router# show spanning-tree mst instance_id
Step 6
Router# copy running-config startup-config
1. type = ethernet, fastethernet, gigabitethernet, or tengigabitethernet
The show spanning-tree mst interface interface_id privileged EXEC command displays information
Note
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 so that it is more likely that a router is chosen as the root bridge.
Exercise care when using this command. For most situations, we recommend that you use the
Note
spanning-tree mst instance_id root primary and the spanning-tree mst instance_id root secondary
global configuration commands to modify the switch priority.
OL-4266-08
Purpose
Configures the cost.
If a loop occurs, MST 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.
Returns to privileged EXEC mode.
Verifies your entries.
(Optional) Saves your entries in the configuration file.
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
Configuring MST
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