HP 3500 Series

3-65
Multiple Instance Spanning-Tree Operation
Troubleshooting an MSTP Configuration
Figure 3-31. Example of show spanning-tree debug-counters instance Command Output for All Ports in the
CIST Instance
HP Switch(config)# show spanning-tree debug-counters instance 0
Status and Counters - CIST Common Debug Counters Information
MST Instance ID : 0
Counter Name Aggregated Value Collected From
--------------------------------- ---------------- --------------
Invalid BPDUs 0 Ports
Errant BPDUs 172603 Ports
MST Config Error BPDUs 0 Ports
Looped-back BPDUs 0 Ports
Starved BPDUs 0 Ports
Exceeded Max Age BPDUs 0 Ports
Exceeded Max Hops BPDUs 0 Ports
Topology Changes Detected 1 Ports
Topology Changes Tx 3 Ports
Topology Changes Rx 2 Ports
Topology Change ACKs Tx 0 Ports
Topology Change ACKs Rx 0 Ports
TCN BPDUs Tx 0 Ports
TCN BPDUs Rx 0 Ports
CFG BPDUs Tx 0 Ports
CFG BPDUs Rx 0 Ports
RST BPDUs Tx 0 Ports
RST BPDUs Rx 0 Ports
MST BPDUs Tx 5 Ports
MST BPDUs Rx 172577 Ports