User Guide
336
Configuring Spanning Tree
MSTP Configurations
3.2.4 Enabling Spanning Tree Globally
Follow these steps to configure the spanning tree mode as MSTP and enable spanning tree
function globally:
Step 1
configure
Enter global configuration mode.
Step 2
spanning-tree mode
mstp
Configure the spanning tree mode as MSTP.
mstp:
Specify the spanning tree mode as MSTP.
Step 3
spanning-tree
Enable spanning tree function globally.
Step 4
show spanning-tree active
(Optional) View the active information of MSTP.
Step 5
end
Return to privileged EXEC mode.
Step 6
copy running-config startup-config
Save the settings in the configuration file.
This example shows how to configure the spanning tree mode as MSTP and enable
spanning tree function globally :
Switch#configure
Switch(config)#spanning-tree mode mstp
Switch(config)#spanning-tree
Switch(config)#show spanning-tree active
Spanning tree is enabled
Spanning-tree’s mode: MSTP (802.1s Multiple Spanning Tree Protocol)
Latest topology change time: 2006-01-04 10:47:42
MST-Instance 0 (CIST)
Root Bridge
Priority : 32768
Address : 00-0a-eb-13-23-97
External Cost : 200000
Root Port : Gi/0/20
Designated Bridge
Downloaded from
