`show spanning-tree vlan`

Syntax

show spanning-tree vlan <VLAN-ID> [detail] [vsx-peer]

Description

Displays the spanning tree mode and information on the RPVST instance of the specified VLAN and optionally displays details on the RPVST instance for the VLAN.

Command context

Operator (>) or Manager (#)

Parameters

<VLAN-ID>: Specifies the number of a VLAN. Range: 1 - 4040.
detail: Specifies displaying details on the RPVST instance for the VLAN.
[vsx-peer]: Shows the output from the VSX peer switch. If the switches do not have the VSX configuration or the ISL is down, the output from the VSX peer switch is not displayed.

Authority

Operators or Administrators. Users without administrator authority can execute this command from the operator context (>) only.

Examples

Showing spanning tree mode and RPVST instance information for the specified VLAN:

switch# show spanning-tree vlan 2
VLAN2
Spanning tree status: Enabled Protocol: RPVST
  Root ID    Priority   : 32768
             MAC-Address: 70:72:cf:76:43:2a
             This bridge is the root
             Hello time(in seconds):2  Max Age(in seconds):20
             Forward Delay(in seconds):15

  Bridge ID  Priority  : 32768
             MAC-Address: 70:72:cf:76:43:2a
             Hello time(in seconds):2  Max Age(in seconds):20
             Forward Delay(in seconds):15

Port         Role           State      Cost    Priority   Type
------------ -------------- ---------- ------- ---------- ----------
1/1/1        Designated     Forwarding 0       128        point_to_point
1/1/5        Designated     Forwarding 0       128        point_to_point

Showing spanning tree mode and detailed RPVST instance information for the specified VLAN:

switch# show spanning-tree vlan 2 detail
VLAN2
Spanning tree status: Enabled Protocol: RPVST
  Root ID    Priority   : 32768
             MAC-Address: 70:72:cf:76:43:2a
             This bridge is the root
             Hello time(in seconds):2  Max Age(in seconds):20
             Forward Delay(in seconds):15

  Bridge ID  Priority  : 32768
             MAC-Address: 70:72:cf:76:43:2a
             Hello time(in seconds):2  Max Age(in seconds):20
             Forward Delay(in seconds):15

Port         Role           State      Cost    Priority   Type
------------ -------------- ---------- ------- ---------- ----------
1/1/1        Designated     Forwarding 0       128        point_to_point
1/1/5        Designated     Forwarding 0       128        point_to_point

Topology change flag : False
Number of topology changes : 1
Last topology change occurred : 33293 seconds ago

Port 1/1/1
Designated root has priority :32768 Address: 48:0f:cf:af:22:1d
Designated bridge has priority :32768 Address: 48:0f:cf:af:22:1d
Designated port :1
Number of transitions to forwarding state : 0
BPDUs sent 1582, received 1506