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Command Reference Guide Global Configuration Mode Command Set

bridge <group#> priority <value>

Use the bridge priority command to set the priority for bridging interfaces in the specified bridge group.

The lower the priority value, the higher the likelihood the configured bridge interface will be the root for

the bridge group. To return to the default bridge priority value, use the no version of this command.

Syntax Description

<group#>

Bridge group number (1 to 255) specified using the

bridge-group

command

<value>

Priority value for the bridge interface. Configuring this value to a low number

increases the interface’s chance of being the root. Therefore, the maximum

priority level would be 0.

Default Values

<value>

32768

Command Modes

(config)# Global Configuration Mode

Command History

Release 1.1 Command was introduced

Functional Notes

A root bridge is necessary for each bridging physical interface for the spanning-tree to be computed. The

specified value is inversely proportional to the likelihood the bridge interface will be the root path. Set the

priority value lower to increase the chance the interface will be the root.

Usage Examples

The following example globally sets the maximum priority for the bridge interface 1:

(config)#

bridge 1 priority 0

Technology Review

Priority values are used by the spanning-tree protocol when analyzing a bridged network for root and

redundant paths. In addition to priority values, spanning-tree protocol uses assigned path costs to identify and

rank valid data paths.

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