The statistics about Multiple Spanning Tree Protocol (MSTP) topology changes can be viewed. If the statistics increase, network flapping occurs.
Procedure
- Run the display stp [ process process-id ] [ instance instance-id ] topology-change command to view the statistics about MSTP topology changes.
In the case of a non-zero process, run the stp process process-id command to create a process before running the preceding command.
- Run the display stp [ process process-id ] [ instance instance-id ] [ interface interface-type interface-number | vsi vsi-name pw pw-name | slot slot-id ] tc-bpdu statistics command to view the statistics about Topology Change/Topology Change Notification (TC/TCN) packets.
In the case of a non-zero process, run the stp process process-id command to create a process before running the preceding command.