Administrator Guide

• Bridges block a redundant path by disabling one of the link ports.
Figure 111. Spanning Tree Enabled Globally
To enable STP globally, use the following commands.
1 Enter PROTOCOL SPANNING TREE mode.
CONFIGURATION mode
protocol spanning-tree 0
2 Enable STP.
PROTOCOL SPANNING TREE mode
no disable
To disable STP globally for all Layer 2 interfaces, use the disable command from PROTOCOL SPANNING
TREE mode.
To verify that STP is enabled, use the show config command from PROTOCOL SPANNING TREE mode.
Example of Verifying Spanning Tree is Enabled
Dell(conf)#protocol spanning-tree 0
Dell(conf-span)#show config
!
protocol spanning-tree 0
no disable
Dell#
Spanning Tree Protocol (STP) 873