Cisco Spanning Tree Protocol
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Anzeigen des Spanning Tree zustandes
- switch-gelb#show spanning-tree
VLAN0001 Spanning tree enabled protocol ieee Root ID Priority 32768 Address 0015.177b.84f0 Cost 20019 Port 3 (FastEthernet1/0/1) Hello Time 2 sec Max Age 20 sec Forward Delay 2 sec Bridge ID Priority 32769 (priority 32768 sys-id-ext 1) Address 0011.bb0e.fb00 Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 2 Interface Role Sts Cost Prio.Nbr Type ------------------- ---- --- --------- -------- -------------------------------- Fa1/0/1 Root FWD 19 128.3 P2p Fa1/0/2 Desg FWD 19 128.4 P2p Fa1/0/48 Desg FWD 19 128.52 P2p
Port 2 wurde auf beiden Swichtes zum Trunking konfiguriert
Untersuchung von Vlan 10
- switch-rot#show spanning-tree vlan 10
VLAN0010
Spanning tree enabled protocol ieee Root ID Priority 32778 Address 0011.bb0e.fb00 Cost 19 Port 2 (GigabitEthernet1/0/2) Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32778 (priority 32768 sys-id-ext 10) Address 0012.d9a3.4400 Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
---- --- --------- -------- --------------------------------
Gi1/0/2 Root FWD 19 128.2 P2p Gi1/0/24 Altn BLK 19 128.24 P2p
Port Gi1/0/24 blockt
Ziehen von Port Gi1/0/2
- show spanning-tree vlan 10
... Gi1/0/24 Root LRN 19 128.24 P2 ...
Nach einer gewissen Zeit.
... Gi1/0/24 Root FWD 19 128.24 P2p ...