HP 6120XG HP ProCurve Series 6120 Blade Switches Advanced Traffic Management G - Page 160
Displaying Debug Counters for All MST Instances, show spanning-tree debug-counters, counters
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Multiple Instance Spanning-Tree Operation Troubleshooting an MSTP Configuration Displaying Debug Counters for All MST Instances The show spanning-tree debug-counters command allows you to display the aggregate values of all MSTP debug counters that are maintained on a switch. These aggregate values are a summary of the information collected from all ports and from all spanning-tree instances that forward traffic on switch ports. Use the displayed diagnostic information to globally monitor MSTP operation on a per-switch basis. Syntax: show spanning-tree debug-counters This command displays debug counters for MSTP activity on all ports configured for VLANs used in spanning-tree instances. The following example shows sample output of the show spanning-tree debugcounters command for all ports. For a description of each counter, refer to Table 4-1 on page 4-66. ProCurve(config)# show spanning-tree debug-counters Status and Counters - MSTP Bridge Common Debug Counters Information Counter Name Aggregated Value Collected From Invalid BPDUs 0 CIST Errant BPDUs 170927 CIST MST Config Error BPDUs 0 CIST Looped-back BPDUs 0 CIST Starved BPDUs/MSTI MSGs 0 CIST/MSTIs Exceeded Max Age BPDUs 0 CIST Exceeded Max Hops BPDUs/MSTI MSGs 0 CIST/MSTIs Topology Changes Detected 2 CIST/MSTIs Topology Changes Tx 6 CIST/MSTIs Topology Changes Rx 4 CIST/MSTIs Topology Change ACKs Tx 0 CIST Topology Change ACKs Rx 0 CIST TCN BPDUs Tx 0 CIST TCN BPDUs Rx 0 CIST CFG BPDUs Tx 0 CIST CFG BPDUs Rx 0 CIST RST BPDUs Tx 0 CIST RST BPDUs Rx 0 CIST MST BPDUs/MSTI MSGs Tx 10 CIST/MSTIs MST BPDUs/MSTI MSGs Rx 341802 CIST/MSTIs Figure 4-25. Example of show spanning-tree debug-counters Command Output 4-61