Configuring Spanning Tree
Configuration Example for MSTP
Configuration Guide
259
Interface Prio Cost Role Status LAG
--------- ---- -------- ------ ----- ----
Gi1/0/1 128 400000 Root Fwd N/A
Gi1/0/2 128 200000 Altn Blk N/A
Verify the configurations of Switch A in instance 2:
Switch(config)#show spanning-tree mst instance 2
MST-Instance 2
Root Bridge
Priority : 0
Address : 3c-46-d8-9d-88-f7
Internal Cost : 200000
Root Port : 2
Designated Bridge
Priority : 0
Address : 3c-46-d8-9d-88-f7
Local Bridge
Priority : 32768
Address : 00-0a-eb-13-23-97
Interface Prio Cost Role Status LAG
--------- ---- -------- ------- ------- ----
Gi1/0/1 128 200000 Desg Fwd N/A
Gi1/0/2 128 200000 Root Fwd N/A
Switch B
Verify the configurations of Switch B in instance 1:
Switch(config)#show spanning-tree mst instance 1
MST-Instance 1
Root Bridge
Priority : 0
Address : 00-0a-eb-13-12-ba