Cisco Catalyst 4500 Series Command Reference Manual page 985

Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
Examples This example shows how to display spanning-tree information on the active interfaces only:
Switch# show spanning-tree active
UplinkFast is disabled
BackboneFast is disabled
VLAN1 is executing the ieee compatible Spanning Tree protocol
Bridge Identifier has priority 32768, address 0050.3e8d.6401
Configured hello time 2, max age 20, forward delay 15
Current root has priority 16384, address 0060.704c.7000
Root port is 265 (FastEthernet5/9), cost of root path is 38
Topology change flag not set, detected flag not set
Number of topology changes 0 last change occurred 18:13:54 ago
Times:
Timers: hello 0, topology change 0, notification 0
Port 265 (FastEthernet5/9) of VLAN1 is forwarding
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 BackboneFast 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)
Number of RLQ request PDUs received (all VLANs)
Number of RLQ response PDUs received (all VLANs)
Number of RLQ request PDUs sent (all VLANs)
Number of RLQ response PDUs sent (all VLANs)
Switch#
This example shows how to display spanning-tree information for the bridge:
Switch# show spanning-tree bridge
VLAN1
Bridge ID
VLAN2
Bridge ID
VLAN3
Bridge ID
Switch#
This example shows how to display a summary of interface information:
Switch# show spanning-tree
VLAN1
OL-27596 -01
hold 1, topology change 24, notification 2
hello 2, max age 14, forward delay 10
Priority 32768
Address 0050.3e8d.6401
Hello Time 2 sec
Priority 32768
Address 0050.3e8d.6402
Hello Time 2 sec
Priority 32768
Address 0050.3e8d.6403
Hello Time 2 sec
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
: 0
: 0
: 0
: 0
: 0
Max Age 20 sec Forward Delay 15 sec
Max Age 20 sec Forward Delay 15 sec
Max Age 20 sec Forward Delay 15 sec
show spanning-tree
2-927