Cisco Systems 3130 Changing the Interface Priority, Assigning a Path Cost

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Cisco Catalyst Blade Switch 3130 for Dell Software Configuration Guide
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Chapter46 Configuring Fallback Bri dging Configuring Fallback Bridging
To return to the default setting, use the no bridge bridge-group priority global configuration command.
To change the priority on a port, use the bridge-group priority interface configuration command
(described in the next section).
This example shows how to set the switch priority to 100 for bridge group 10:
Switch(config)# bridge 10 priority 100
Changing the Interface Priority
You can change the priority for a port. When two switches tie for position as the root switch, you
configure a port priority to break the tie. The switch with the lowest interface value is elected.
Beginning in privileged EXEC mode, follow these steps to change the interface priority . Th is procedu re
is optional.
To return to the default setting, use the no bridge-group bridge-group priority interface configuration
command.
This example shows how to change the priority to 20 on a port in bridge group 10:
Switch(config)# interface gigabitethernet2/0/1
Switch(config-if)# bridge-group 10 priority 20
Assigning a Path Cost
Each port has a path cost associated with it. By convention, the path cost is 1000/data rate of the attached
LAN, in Mb/s.
Beginning in privileged EXEC mode, follow these steps to assign a path cost. This procedure is optional.
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 interface interface-id Specify the interface to set the priority, and enter interface
configuration mode.
Step3 bridge-group bridge-group priority
number Change the priority of a port.
•For bridge-group, specify the bridge group number. The range is 1
to 255.
•For number, enter a number from 0 to 255 in increments of 4. The
lower the number, the more likely that the port on the switch will
be chosen as the root. The default is 128.
Step4 end Return to privileged EXEC mode.
Step5 show running-config Verify your entry.
Step6 copy running-config startup-config (Optional) Save your entry in the configuration file.
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 interface interface-id Specify the port to set the path cost, and enter interface configuration
mode.