Cisco Catalyst 2950 Command Reference Manual page 233

Chapter 2 Cisco IOS Commands
Examples
This is an example of output from the show spanning-tree active command:
Switch# show spanning-tree active
VLAN0001
Spanning tree enabled protocol ieee
Root ID
Bridge ID
Interface
Name
---------------- -------- --------- --- --------- -------------------- --------
Gi0/1
Gi0/2
Po1
This is an example of output from the show spanning-tree detail command:
Switch> show spanning-tree detail
VLAN0001 is executing the ieee compatible Spanning Tree protocol
Bridge Identifier has priority 32768, sysid 1, address 0002.4b29.7a00
Configured hello time 2, max age 20, forward delay 15
Current root has priority 32768, address 0001.4297.e000
Root port is 1 (GigabitEthernet0/1), cost of root path is 57
Topology change flag not set, detected flag not set
Number of topology changes 2 last change occurred 2d18h ago
Times:
Timers: hello 0, topology change 0, notification 0, aging 300
Port 1 (GigabitEthernet0/1) of VLAN0001 is forwarding
Port path cost 19, Port priority 128, Port Identifier 128.1.
Designated root has priority 32768, address 0001.4297.e000
Designated bridge has priority 32768, address 0030.9441.62c1
Designated port id is 128.25, designated path cost 38
Timers: message age 4, forward delay 0, hold 0
Number of transitions to forwarding state: 1
BPDU: sent 2, received 120638
<output truncated>
This is an example of output from the show spanning-tree interface fastethernet 0/1 command:
Switch> show spanning-tree interface fastethernet0/1
Vlan
Name
---------------- -------- --------- --- --------- -------------------- --------
VLAN0001
78-11381-05
Priority 32768
Address 0001.4297.e000
Cost 57
Port 1 (GigabitEthernet0/1)
Hello Time 2 sec
Priority 32769
Address 0002.4b29.7a00
Hello Time 2 sec
Aging Time 300
Port ID
Prio.Nbr Cost Sts
128.1
128.2
128.65
from Port-channel1
hold 1, topology change 35, notification 2
hello 2, max age 20, forward delay 15
Port ID
Prio.Nbr Cost Sts
128.1
Max Age 20 sec Forward Delay 15 sec
(priority 32768 sys-id-ext 1)
Max Age 20 sec Forward Delay 15 sec
Designated
Cost Bridge ID
19 FWD 38 32768 0030.9441.62c1 128.25
19 FWD 57 32769 0002.4b29.7a00 128.2
19 FWD 57 32769 0002.4b29.7a00 128.65
Designated
Cost Bridge ID
19 FWD 38 32768 0030.9441.62c1 128.25
Catalyst 2950 Desktop Switch Command Reference
show spanning-tree
Port ID
Prio.Nbr
Port ID
Prio.Nbr
2-209