Cisco 3560x-24p 参考指南
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Catalyst 3750-X and 3560-X Switch Command Reference
OL-21522-02
Chapter 2 Catalyst 3750-X and 3560-X Cisco IOS Commands
spanning-tree mode
spanning-tree mode
Use the spanning-tree mode global configuration command on the switch stack or on a standalone
switch to enable per-VLAN spanning-tree plus (PVST+), rapid PVST+, or multiple spanning tree (MST)
on your switch. Use the no form of this command to return to the default setting.
switch to enable per-VLAN spanning-tree plus (PVST+), rapid PVST+, or multiple spanning tree (MST)
on your switch. Use the no form of this command to return to the default setting.
spanning-tree mode {mst | pvst | rapid-pvst}
no spanning-tree mode
Syntax Description
Defaults
The default mode is PVST+.
Command Modes
Global configuration
Command History
Usage Guidelines
The switch supports PVST+, rapid PVST+, and MSTP, but only one version can be active at any time:
All VLANs run PVST+, all VLANs run rapid PVST+, or all VLANs run MSTP. All stack members run
the same version of spanning-tree.
All VLANs run PVST+, all VLANs run rapid PVST+, or all VLANs run MSTP. All stack members run
the same version of spanning-tree.
When you enable the MST mode, RSTP is automatically enabled.
Caution
Changing spanning-tree modes can disrupt traffic because all spanning-tree instances are stopped for the
previous mode and restarted in the new mode.
previous mode and restarted in the new mode.
Examples
This example shows to enable MST and RSTP on the switch:
Switch(config)# spanning-tree mode mst
This example shows to enable rapid PVST+ on the switch:
Switch(config)# spanning-tree mode rapid-pvst
You can verify your setting by entering the show running-config privileged EXEC command.
mst
Enable MST and Rapid Spanning Tree Protocol (RSTP) (based on IEEE 802.1s and
IEEE 802.1w).
IEEE 802.1w).
pvst
Enable PVST+ (based on IEEE 802.1D).
rapid-pvst
Enable rapid PVST+ (based on IEEE 802.1w).
Release
Modification
12.2(53)SE2
This command was introduced.