Displaying status for a specific VLAN

Syntax:


show spanning-tree vlan <vlan-id>

Displays detailed spanning tree information for the VLAN and the ports belonging to the specified VLAN.

Displaying status for a specific VLAN

switch# show spanning-tree vlan 20

 Spanning Tree Information

  STP Enabled              [No] : Yes
  Mode                          : RPVST
  Extended System ID            : Disabled
  Ignore PVID Inconsistency    : Disabled
  Switch MAC Address            : 0024a8-d13a40


  VLAN ID                       : 20
  RPVST Enabled                 : Enabled


  Root MAC Address              : 0024a8-d13a40
  Root Priority                 : 32,768
  Root Path Cost                : 0
  Root Port                     : This switch is root
  Operational Hello Time (secs) : 2
  Topology Change Count         : 38
  Time Since Last Change        : 23 hours

                                                          Designated
  Port  Type       Cost   Priority  Role       State      Bridge
  ----- ---------- ------ --------- ---------- ---------- ---------------
  9     100/1000T  20000  128       Designated Forwarding 0024a8-d13a40
  21    100/1000T  20000  128       Designated Forwarding 0024a8-d13a40
  22    100/1000T  20000  128       Designated Forwarding 0024a8-d13a40
  23    100/1000T  200000 128       Designated Forwarding 0024a8-d13a40
  24    100/1000T  0      128                  Disabled