Cisco Catalyst 3750-X Command Reference Manual page 833

Chapter 2 Catalyst 3750-X and 3560-X Switch Cisco IOS Commands
Command Modes User EXEC
Command History Release
12.2(53)SE2
Usage Guidelines If the vlan-id variable is omitted, the command applies to the spanning-tree instance for all VLANs.
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>
OL-29704-01
Modification
This command was introduced.
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
Max Age 20 sec Forward Delay 15 sec
Max Age 20 sec Forward Delay 15 sec
Prio.Nbr Type
128.24 P2p
Catalyst 3750-X and 3560-X Switch Command Reference
show spanning-tree
2-801