Spanning-Tree Mst Priority - Cisco ME 3400 Command Reference Manual

Ethernet access switch

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spanning-tree mst priority

Use the spanning-tree mst priority global configuration command to set the switch priority for the

specified spanning-tree instance. Use the no form of this command to return to the default setting.

Syntax Description

The default is 32768.

Command Modes

Global configuration

Command History

Usage Guidelines

Spanning Tree Protocol (STP) is not supported on user network interfaces (UNIs); it is only supported

on network node interfaces (NNIs) or on enhanced network interfaces (ENIs) on which STP has been

enabled. To set a port as an ENI or NNI, enter the port-type {eni | nni} interface configuration

command. To enable STP on an ENI, enter the spanning-tree interface configuration command.

This example shows how to set the spanning-tree priority to 8192 for multiple spanning-tree instances

(MST) 20 to 21:

Switch(config)# spanning-tree mst 20-21 priority 8192

You can verify your settings by entering the show spanning-tree mst instance-id privileged EXEC

Cisco ME 3400 Ethernet Access Switch Command Reference

spanning-tree mst instance-id priority priority

no spanning-tree mst instance-id priority

Range of spanning-tree instances. 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.

Set the switch priority for the specified spanning-tree instance. This setting affects

the likelihood that the switch is selected as the root switch. A lower value increases

the probability that the switch is selected as the root switch.

The range is 0 to 61440 in increments of 4096. Valid priority values are 0, 4096,

8192, 12288, 16384, 20480, 24576, 28672, 32768, 36864, 40960, 45056, 49152,

53248, 57344, and 61440. All other values are rejected.

Modification

This command was introduced.

The instance-id range changed to 0 to 4094.

Chapter 2 Cisco ME 3400 Ethernet Access Switch Cisco IOS Commands