Cisco Catalyst 4500 Series Configuration Manual page 1093

Chapter 2
Whenever you change an MST configuration submode parameter, it can cause a loss of connectivity. To
reduce the number of service disruptions, when you enter the MST configuration submode, you are
changing a copy of the current MST configuration. When you are done editing the configuration, you
can apply all the changes at once by using the exit keyword, or you can exit the submode without
committing any change to the configuration by using the abort keyword.
In the unlikely event that two users enter a new configuration at exactly at the same time, this message
is displayed:
Switch(config-mst)# exit
% MST CFG:Configuration change lost because of concurrent access
Switch(config-mst)#
Examples The following example shows how to enter the MST configuration submode:
Switch(config)# spanning-tree mst configuration
Switch(config-mst)#
The following example shows how to reset the MST configuration to the default settings:
Switch(config)# no spanning-tree mst configuration
Switch(config)#
Related Commands Command
instance
name
revision
show spanning-tree mst
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release XE 3.9.xE and 15.2(5)Ex
Description
Maps a VLAN or a set of VLANs to an MST instance.
Sets the MST region name.
Sets the MST configuration revision number.
Displays MST protocol information.
spanning-tree mst configuration
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