Spanning-Tree Mode - Cisco Catalyst 4500 Series Command Reference Manual

spanning-tree mode

spanning-tree mode
To switch between PVST+ and MST modes, use the spanning-tree mode command. To return to the
default settings, use the no form of this command.
Syntax Description
pvst
mst
rapid-pvst
Defaults
PVST+ mode
Command Modes
Global configuration mode
Command History Release
12.1(8a)EW
12.1(19)EW
Usage Guidelines
Caution Be careful when using the spanning-tree mode command to switch between PVST+ and MST modes.
When you enter the command, all spanning-tree instances are stopped for the previous mode and
restarted in the new mode. Using this command may cause disruption of user traffic.
Examples
This example shows how to switch to MST mode:
Switch(config)# spanning-tree mode mst
Switch(config)#
This example shows how to return to the default mode (PVST):
Switch(config)# no spanning-tree mode
Switch(config)#
Related Commands Command
show spanning-tree mst
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.3.0SG and IOS 15.1(1)SG)
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spanning-tree mode {pvst | mst | rapid-pvst}
no spanning-tree mode {pvst | mst | rapid-pvst}
Specifies PVST+ mode.
Specifies MST mode.
Specifies Rapid PVST mode.
Modification
Support for this command was introduced on the Catalyst 4500 series switch..
Support for the rapid-pvst keyword.
Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
Description
Displays MST protocol information.
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