Configuring Spanning Tree
STP/RSTP Configurations
Configuration Guide
217
Step 6
copy running-config startup-config
Save the settings in the configuration file.
This example shows how to enable spanning tree function, configure the spanning tree
mode as RSTP and verify the configurations:
Switch#configure
Switch(config)#spanning tree mode rstp
Switch(config)#spanning-tree
Switch(config)#show spanning-tree active
Spanning tree is enabled
Spanning-tree’s mode: RSTP (802.1w Rapid Spanning Tree Protocol)
Latest topology change time: 2006-01-02 10:04:02
Root Bridge
Priority : 32768
Address : 00-0a-eb-13-12-ba
Local bridge is the root bridge
Designated Bridge
Priority : 32768
Address : 00-0a-eb-13-12-ba
Local Bridge
Priority : 32768
Address : 00-0a-eb-13-12-ba
Interface State Prio Ext-Cost Int-Cost Edge P2p Mode Role Status
--------- -------- ---- -------- -------- ---- --------- ----- ----- -------
Gi1/0/16 Enable 128 200000 200000 No Yes(auto) Rstp Desg Fwd
Gi1/0/18 Enable 128 200000 200000 No Yes(auto) Rstp Desg Fwd
Gi1/0/20 Enable 128 200000 200000 No Yes(auto) Rstp Desg Fwd
Switch(config)#end
Switch#copy running-config startup-config