Specifications

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Catalyst 4500 Se ries S wit ch C is co IO S C om mand R efer ence —Re lease I OS XE 3 .3.0 XO(1 5.1 (1)XO)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
show spanning-tree
Port path cost 19, Port priority 128, Port Identifier 129.9.
Designated root has priority 16384, address 0060.704c.7000
Designated bridge has priority 32768, address 00e0.4fac.b000
Designated port id is 128.2, designated path cost 19
Timers: message age 3, forward delay 0, hold 0
Number of transitions to forwarding state: 1
BPDU: sent 3, received 32852
Switch#
This example shows how to display the spanning -tree Backbon eFast status:
Switch# show spanning-tree backbonefast
BackboneFast is enabled
BackboneFast statistics
-----------------------
Number of transition via backboneFast (all VLANs) : 0
Number of inferior BPDUs received (all VLANs) : 0
Number of RLQ request PDUs received (all VLANs) : 0
Number of RLQ response PDUs received (all VLANs) : 0
Number of RLQ request PDUs sent (all VLANs) : 0
Number of RLQ response PDUs sent (all VLANs) : 0
Switch#
This example shows how to display spanning-tree information for the bridge:
Switch# show spanning-tree bridge
VLAN1
Bridge ID Priority 32768
Address 0050.3e8d.6401
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
VLAN2
Bridge ID Priority 32768
Address 0050.3e8d.6402
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
VLAN3
Bridge ID Priority 32768
Address 0050.3e8d.6403
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Switch#
This example shows how to display a summary of interface information:
Switch# show spanning-tree
VLAN1
Spanning tree enabled protocol ieee
Root ID Priority 32768
Address 0030.94fc.0a00
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768
Address 0030.94fc.0a00
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Designated
Name Port ID Prio Cost Sts Cost Bridge ID Port ID
------------------- ------- --- ------ --- ---- -------------------- -------
FastEthernet6/15 129.79 128 19 FWD 0 32768 0030.94fc.0a00 129.79
VLAN2
Spanning tree enabled protocol ieee