Spanning-Tree Mst Configuration - Cisco Catalyst 3550 Command Reference Manual
Multilayer switch
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- Command reference manual (662 pages) ,
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Chapter 2 Catalyst 3550 Switch Cisco IOS Commands
spanning-tree mst configuration
Use the spanning-tree mst configuration global configuration command 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.
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
Release
12.1(9)EA1
12.2(25)SEC
Usage Guidelines
Entering the spanning-tree mst configuration command enables the MST configuration mode. These
configuration commands are available:
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In MST mode, the switch supports up to 65 MST instances. The number of VLANs that can be mapped
to a particular MST instance is unlimited.
OL-8566-01
spanning-tree mst configuration
no spanning-tree mst configuration
Modification
This command was introduced.
The instance-id range changed to 1 to 4094.
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.
spanning-tree mst configuration
Catalyst 3550 Multilayer Switch Command Reference
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