Name: Cisco Catalyst 3750-X
Brand: Cisco
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Catalyst 3750-X and 3560-X Switch Command Reference

OL-29704-01

Chapter 2 Catalyst 3750-X and 3560-X Switch Cisco IOS Commands

spanning-tree mst configuration

Use the spanning-tree mst configuration global configuration command on the switch stack or on a

standalone switch to enter multiple spanning-tree (MST) configuration mode through which you

configure the MST region. Use the no form of this command to return to the default settings.

spanning-tree mst configuration

no spanning-tree mst configuration

Syntax Description This command has no arguments or keywords.

Defaults The default mapping is that all VLANs are mapped to the common and internal spanning-tree (CIST)

instance (instance 0).

The default name is an empty string.

The revision number is 0.

Command Modes Global configuration

Command History

Usage Guidelines The spanning-tree mst configuration command enables the MST configuration mode. These

configuration commands are available:

• abort: exits the MST region configuration mode without applying configuration changes.

• exit: exits the MST region configuration mode and applies all configuration changes.

• instance instance-id vlan vlan-range: maps VLANs to an MST instance. The range for the

instance-id is 1 to 4094. The range for vlan-range is 1 to 4094. You can specify a single VLAN

identified by VLAN ID number, a range of VLANs separated by a hyphen, or a series of VLANs

separated by a comma.

• name name: sets the configuration name. The name string has a maximum length of 32 characters

and is case sensitive.

• no: negates the instance, name, and revision commands or sets them to their defaults.

• private-vlan: Though visible in the command-line help strings, this command is not supported.

• revision version: sets the configuration revision number. The range is 0 to 65535.

• show [current | pending]: displays the current or pending MST region configuration.

In MST mode, the switch or switch stack supports up to 65 MST instances. The number of VLANs that

can be mapped to a particular MST instance is unlimited.

Release Modification

12.2(53)SE2 This command was introduced.

Cisco Catalyst 3750-X Command Reference

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