Cisco 7604 User Manual

19-23
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 19 Configuring Standard-Compliant IEEE MST
Configuring MST
Note 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 so that it is more likely that a router is chosen as the root bridge.
Note 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.
Step 3
Router(config-if)# spanning-tree mst instance_id
cost
cost
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.
Step 4
Router(config-if)# end
Returns to privileged EXEC mode.
Step 5
Router# show spanning-tree mst interface
interface_id
or
Router# show spanning-tree mst instance_id
Verifies your entries.
Step 6
Router# copy running-config startup-config
(Optional) Saves your entries in the configuration file.
1. type = ethernet, fastethernet, gigabitethernet, or tengigabitethernet
Command Purpose

Cisco 7604 Specifications

General

Brand	Cisco
Model	7604
Category	Network Router
Language	English