HP 6120XG HP ProCurve Series 6120 Blade Switches Advanced Traffic Management G - Page 163
Displaying Debug Counters for Ports in an MST Instance
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Multiple Instance Spanning-Tree Operation Troubleshooting an MSTP Configuration Displaying Debug Counters for Ports in an MST Instance The show spanning-tree debug-counters instance ports command allows you to display the aggregate values of all MSTP debug counters maintained on one or more ports used by a specified spanning-tree instance. These aggregate values are a summary of information collected from the specified ports that have VLANs assigned to the specified instance. Use the show spanning-tree debug-counters instance ports command to troubleshoot at a finer level the more general MSTP diagnostic information displayed in show spanning-tree debug-counters instance command output when you suspect unauthorized MSTP activity on one or more MST ports in an MST instance. Syntax: show spanning-tree debug-counters instance ports This command displays debug counters for MSTP activity on the specified ports configured for VLANs in the specified MST instance. The valid values for instance are from 0 to 16: • 0 specifies the default MST (CIST) instance. • 1 to 16 specify an MST instance. The ports parameter specifies one or more MST ports or trunk ports. In the port list, enter a series of ports by separating the first and last ports in the series with a dash (-); for example, a2-a8 or trk1-trk3. Separate individual ports and series of ports with a comma; for example, a2-a8, a20, trk1, trk4-trk5. The following examples shows sample output of the show spanning-tree debugcounters instance ports command for both the CIST (default MST instance 0) and an MST instance (instance 2) on port A15. For a description of each counter, refer to Table 4-1 on page 4-66. 4-64