Users Guide

Figure 120. 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
Examples of Verifying Spanning Tree Information
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.
Dell(conf)#protocol spanning-tree 0
Dell(config-span)#show config
!
protocol spanning-tree 0
no disable
Dell#
To view the spanning tree conguration and the interfaces that are participating in STP, use the show spanning-tree 0 command
from EXEC privilege mode. If a physical interface is part of a port channel, only the port channel is listed in the command output.
R2#show spanning-tree 0
Executing IEEE compatible Spanning Tree Protocol
Bridge Identifier has priority 32768, address 0001.e826.ddb7
Configured hello time 2, max age 20, forward delay 15
Current root has priority 32768, address 0001.e80d.2462
Root Port is 289 (TenGigabitEthernet 1/1/2/1), cost of root path is 4
788
Spanning Tree Protocol (STP)