Cisco Catalyst 3750 Command Reference Manual page 489

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Chapter 2 Catalyst 3750 Switch 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
Uplinkfast enabled
Interface
---------------- ---- --- --------- -------- --------------------------------
Gi2/0/1
<output truncated>
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 49152, sysid 1, address 0003.fd63.9580
Configured hello time 2, max age 20, forward delay 15
Current root has priority 32768, address 0001.42e2.cdd0
Root port is 24 (GigabitEthernet2/0/1), cost of root path is 3038
Topology change flag not set, detected flag not set
Number of topology changes 0 last change occurred 1d16h ago
Times:
Timers: hello 0, topology change 0, notification 0, aging 300
Uplinkfast enabled
Port 1 (GigabitEthernet2/0/1) of VLAN0001 is forwarding
Port path cost 3019, Port priority 128, Port Identifier 128.24.
Designated root has priority 32768, address 0001.42e2.cdd0
Designated bridge has priority 32768, address 00d0.bbf5.c680
Designated port id is 128.25, designated path cost 19
Timers: message age 2, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 0, received 72364
<output truncated>
This is an example of output from the show spanning-tree interface interface-id command:
Switch# show spanning-tree interface gigabitethernet2/0/1
Vlan
---------------- ---- --- --------- -------- --------------------------------
VLAN0001
Switch# show spanning-tree summary
Switch is in pvst mode
Root bridge for: none
EtherChannel misconfiguration guard is enabled
Extended system ID
Portfast
PortFast BPDU Guard
Portfast BPDU Filter is disabled by default
Loopguard
78-16181-03
Priority
32768
Address
0001.42e2.cdd0
Cost
3038
Port
24 (GigabitEthernet2/0/1)
Hello Time
2 sec
Priority
49153
(priority 49152 sys-id-ext 1)
Address
0003.fd63.9580
Hello Time
2 sec
Aging Time 300
Role Sts Cost
Root FWD 3019
hold 1, topology change 35, notification 2
hello 2, max age 20, forward delay 15
Role Sts Cost
Root FWD 3019
is enabled
is disabled by default
is disabled by default
is disabled by default
Max Age 20 sec
Forward Delay 15 sec
Max Age 20 sec
Forward Delay 15 sec
Prio.Nbr Type
128.24
P2p
Prio.Nbr Type
128.24
P2p
Catalyst 3750 Switch Command Reference
show spanning-tree
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