Cisco 4500M Command Reference

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Catalyst4500 Series SwitchCiscoIOS Command Reference—Release 12.2(18)EW
78-16201-01
Chapter2Cisco IOS Commands for the Catalyst 4500 Series Switches
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.
spanning-tree mode {pvst | mst | rapid-pvst}
no spanning-tree mode {pvst | mst | rapid-pvst}
Syntax Description
Defaults PVST+ mode
Command Modes Configuration
Command History
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 show spanning-tree mst
pvst Specifies PVST+ mode.
mst Specifies MST mode.
rapid-pvst Specifies Rapid PVST mode.
Release Modification
12.1(8a)EW Support for this command was introduced on the Catalyst 4500 series switch.
12.1(19)EW Support for the rapid-pvst keyword.

Cisco 4500M Specifications

General

Brand	Cisco
Model	4500M
Category	Network Router
Language	English