Spanning-Tree Protocol In this configuration STP will block these ports F0/24 of S1 , F0/23 and F0/24 of S2 and F0/24 of S3 to avoid loop at layer to two. Verify those ports blocked due to STP functions Verify STP ports Switch 2 S2#show spanning-tree active VLAN0001 Spanning tree enabled protocol ieee Root ID Priority 32769 Address 0002.174D.7794 Cost 4 Port 26(GigabitEthernet1/2) Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 32769 (priority 32768 sys-id-ext 1) Address 00D0.FF08.82E1 Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 20 Interface Role Sts Cost Prio.Nbr Type ---------------- ---- --- --------- -------- --------------------------- Fa0/1 Desg FWD 19 128.1 P2p Fa0/2 Desg FWD 19 128.2 P2p Fa0/23 Desg FWD 19 128.23 P2p Fa0/24 Altn BLK 19 128.24 P2p Gi1/1 Desg FWD 4 128.25 P2p Gi1/2 Root FWD 4 128.26 P2p [Output is omitted] S2# You can test STP protocols status on S1 and S3 also with show spanning-tree active command
Posted on: Thu, 06 Jun 2013 00:22:59 +0000
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