Configuration Guide     338
Configuring Spanning Tree MSTP Configurations
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
Priority      : 32768
Address       : 00-0a-eb-13-23-97
Regional Root Bridge
Priority      : 36864
Address       : 00-0a-eb-13-12-ba
Local bridge is the regional root bridge
Local Bridge
Priority      : 36864
Address       : 00-0a-eb-13-12-ba