HP 6120XG HP ProCurve Series 6120 Blade Switches Advanced Traffic Management G - Page 166
Displaying Debug Counters for One MST Instance, show spanning-tree debug-counters instance
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Multiple Instance Spanning-Tree Operation Troubleshooting an MSTP Configuration Displaying Debug Counters for One MST Instance The show spanning-tree debug-counters instance command allows you to display the aggregate values of all MSTP debug counters maintained on a switch for a specified spanning-tree instance. These aggregate values are a summary of information collected from all ports that have VLANs assigned to the specified instance. Use the show spanning-tree debug-counters instance command to troubleshoot the global MSTP diagnostic information displayed in show spanning-tree debug-counters command output when you suspect unauthorized MSTP activity in a specific MST instance. Syntax: show spanning-tree debug-counters instance This command displays debug counters for MSTP activity on all ports configured for VLANs in the specified MST instance. The valid values for instance are from 0 to 32: • 0 specifies the default MST (CIST) instance. • 1 to 32 specify a multiple spanning-tree (MST) instance. The following example shows sample output of the show spanning-tree debugcounters instance command when applied to the Common and Internal Spanning Tree (CIST) instance (default MST instance 0) in the network. For a description of each counter, refer to Table 4-1 on page 4-66. 4-62