CCNP TSHOOT CHAPTER 4 (STP)

CCNP TSHOOT CHAPTER 4 (STP)
7. List Spanning-tree Troubleshoot steps .
-->
Solution:
sh spanning-tree vlan 10
sh spanning-tree vlan 10 bridge
sh spanning-tree vlan 10 root
sh spanning-tree vlan 10 summary
sh spanning-tree vlan 10 brief


R1#sh spanning-tree vlan 10

 VLAN10 is executing the ieee compatible Spanning Tree protocol
  Bridge Identifier has priority 32768, address c000.213c.0001
  Configured hello time 2, max age 20, forward delay 15
  We are the root of the spanning tree
  Topology change flag not set, detected flag not set
  Number of topology changes 2 last change occurred 00:22:12 ago
          from FastEthernet1/1
  Times:  hold 1, topology change 35, notification 2
          hello 2, max age 20, forward delay 15
  Timers: hello 0, topology change 0, notification 0, aging 300

 Port 42 (FastEthernet1/1) of VLAN10 is forwarding
   Port path cost 19, Port priority 128, Port Identifier 128.42.
   Designated root has priority 32768, address c000.213c.0001
   Designated bridge has priority 32768, address c000.213c.0001
   Designated port id is 128.42, designated path cost 0
   Timers: message age 0, forward delay 0, hold 0
   Number of transitions to forwarding state: 1
   BPDU: sent 705, received 5

 Port 43 (FastEthernet1/2) of VLAN10 is forwarding
   Port path cost 19, Port priority 128, Port Identifier 128.43.
   Designated root has priority 32768, address c000.213c.0001
   Designated bridge has priority 32768, address c000.213c.0001
   Designated port id is 128.43, designated path cost 0
   Timers: message age 0, forward delay 0, hold 0
   Number of transitions to forwarding state: 1
   BPDU: sent 703, received 2

R1#sh spanning-tree vlan 10 bridge
  Bridge ID  Priority    32768
             Address     c000.213c.0001
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

R1#sh spanning-tree vlan 10 root
  Root ID    Priority    32768
             Address     c000.213c.0001
             This bridge is the root
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

R1#sh spanning-tree vlan 10 summary
Root bridge for VLAN10 is this bridge.
PortFast BPDU Guard is disabled
UplinkFast is disabled
BackboneFast is disabled

Name                 Blocking Listening Learning Forwarding STP Active
-------------------- -------- --------- -------- ---------- ----------
VLAN10               0        0         0        2          2

R1#sh spanning-tree vlan 10 brief

VLAN10
  Spanning tree enabled protocol ieee
  Root ID    Priority    32768
             Address     c000.213c.0001
             This bridge is the root
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32768
             Address     c000.213c.0001
             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
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet1/1      128.42   128    19 FWD     0 32768 c000.213c.0001 128.42
FastEthernet1/2      128.43   128    19 FWD     0 32768 c000.213c.0001 128.43