Spanning Tree: Simulation

Spanning Tree: Simulation

by Cyrus Lok on Thursday, May 13, 2010 at 11:53pm

3550-1 is the root bridge. BID 4096
3550-2 is the secondary bridge which I want it to become root if 3550-2 is down. BID 8192.

I turned off 3550-1

Originally 3550-2

Interface Role Sts Cost Prio.Nbr Type
——————- —- — ——— ——– ——————————–
Fa0/1 Altn BLK 19 128.1 P2p
Fa0/2 Root FWD 19 128.2 P2p

Interface Role Sts Cost Prio.Nbr Type
——————- —- — ——— ——– ——————————–
Fa0/1 Desg LRN 19 128.1 P2p
Fa0/2 Desg FWD 19 128.2 P2p

Network down for 50s

VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 8193
Address 000c.85e5.5380
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 8193 (priority 8192 sys-id-ext 1)
Address 000c.85e5.5380
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300

Interface Role Sts Cost Prio.Nbr Type
——————- —- — ——— ——– ——————————–
Fa0/1 Desg FWD 19 128.1 P2p
Fa0/2 Desg FWD 19 128.2 P2p

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