Cisco 4500M Command Reference Manual page 464

spanning-tree mst configuration
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 warning
message is displayed:
Switch( config-mst)# exit
% MST CFG:Configuration change lost because of concurrent access
Switch( config-mst)#
Examples
This example shows how to enter the MST configuration submode:
Switch(config)# spanning-tree mst configuration
Switch( config-mst)#
This example shows how to reset the MST configuration to the default settings:
Switch(config)# no spanning-tree mst configuration
Switch(config)#
Related Commands
instance
name
revision
show spanning-tree mst
Catalyst4500 Series SwitchCiscoIOS Command Reference—Release 12.2(18)EW
2-432
Chapter2 Cisco IOS Commands for the Catalyst 4500 Series Switches
78-16201-01