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Cisco MWR 2941 Mobile Wireless Edge Router Release 3.5 Command Reference, Cisco IOS Release 15.1(3)MR
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Chapter Cisco MWR 2941 Router Command Reference, Release 15.1(3)MR
spanning-tree mst configuration
spanning-tree mst configuration
To enter MST-configuration submode, use the spanning-tree mst configuration command in global
configuration mode. To return to the default settings, use the no form of this command.
spanning-tree mst configuration
no spanning-tree mst configuration
Syntax Description This command has no arguments or keywords.
Command Default The default value for the Multiple Spanning Tree (MST) configuration is the default value for all its
parameters:
• No VLANs are mapped to any MST instance (all VLANs are mapped to the Common and Internal
Spanning Tree [CIST] instance).
• The region name is an empty string.
• The revision number is 0.
Command Modes Global configuration (config)
Command History
Usage Guidelines The MST configuration consists of three main parameters:
• Instance VLAN mapping—See the instance command
• Region name—See the name (MST configuration submode) command
• Configuration revision number—See the revision command
The abort and exit commands allow you to exit MST configuration submode. The difference between
the two commands depends on whether you want to save your changes or not.
The exit command commits all the changes before leaving MST configuration submode. If you do not
map secondary VLANs to the same instance as the associated primary VLAN, when you exit
MST-configuration submode, a warning message displays and lists the secondary VLANs that are not
mapped to the same instance as the associated primary VLAN. The warning message is as follows:
These secondary vlans are not mapped to the same instance as their primary:
-> 3
The abort command leaves MST-configuration submode without committing any changes.
Release Modification
12.2(14)SX Support for this command was introduced on the Supervisor Engine 720.
12.2(17d)SXB Support for this command on the Supervisor Engine 2 was extended to
Release 12.2(17d)SXB.
12.2(33)SRA This command was integrated into Cisco IOS Release 12.2(33)SRA.
15.0(1)MR This command was integrated into 15.0(1)MR.
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