Specifications

show spanning-tree statistics
254
Display items in Example 1
Item Meaning Displayed information
VLAN VLAN ID subject to PVST+ Displayed only when vlan is specified.
Time Since Topology
Change
Time since a topology
change was detected
n day: Days
n hour: Hours
n minute: Minutes
n second: Seconds
For Rapid STP or Rapid PVST+, this item shows
the time that has elapsed since Spanning Tree
Protocol operation started.
Topology ChangeTimes Number of detecting topology
changes
--
Port Port number --
ChGr Channel group number --
Up The port is in Up status. Indicates that the port is in Up status. This
indicates that the channel group in link
aggregation is in the Up status.
Down The port is in Down status. Indicates that the port is in Down status. This
indicates that the channel group in link
aggregation is in the Down status.
Forward Transit Times Number of transitions to the
forwarding state
--
TxBPDUs Number of sent BPDUs --
RxBPDUs Number of received BPDUs --
RxDiscardsBPDUs Number of discarded
received BPDUs
--
Timeout Number of BPDUs whose
valid time expired
Number of received BPDUs whose valid time
(which is set in the BPDUs) expired
Invalid Number of invalid BPDUs Number of received BPDUs whose format was
invalid
Not Support Number of unsupported
BPDUs
Number of received BPDUs that included
unsupported parameters
Other Number of BPDUs discarded
for another reason
Displays the number of discarded received
BPDUs when BPDU discard has been configured.
- When a BPDU filter has been set
- When the root guard functionality is operating
Example 2
Figure 17-9 Example of displaying Multiple Spanning Tree statistics
> show spanning-tree statistics mst instance 1,4095