Viewing BPDU status and related information

Syntax:

show spanning-tree bpdu-protection port-list

Displays the BPDU protection state and errant BPDU count for ports in the port list.

switch# show spanning-tree 22

 Spanning Tree Information

  STP Enabled    [No] : Yes
  Mode                : RPVST
  RPVST Enabled VLANs : 10,20


  Switch MAC Address  : 0024a8-d13a40

  Port                   : 22
  Status                 : Up           Port Type           : 100/1000T
  BPDU Protection        : No           BPDU Filtering      : No
  Root Guard             : No           TCN Guard           : No
  Loop Guard             : No           Admin Edge Port     : No
  Admin PointToPoint MAC : Yes

  VLAN   Port       Port      Port       Designated    Hello Oper  Oper
  ID     Path-Cost  Priority  State      Bridge        Time  Edge  PtP
  ------ ---------- --------- ---------- ------------- ----- ----- ------
  20     20000      128       Forwarding 0024a8-d13a40 2     No    Yes

switch# show spanning-tree bpdu-protection 11-12,21-24

 Status and Counters - STP BPDU Protection Information

 BPDU Protection Timeout (sec) : 60
 BPDU Protected Ports : 23-24


  Port   Type      Protection State             Errant BPDUs
  ------ --------- ---------- ----------------- ------------
  11     100/1000T No                           0
  12     100/1000T No                           0
  21     100/1000T No                           0
  22     100/1000T No                           0
  23     100/1000T Yes                          0
  24     100/1000T Yes                          0