Troubleshooting Intermittent Problems


Troubleshooting Intermittent Problems

When intermittent problems occur, most IT professionals turn to packet capture to diagnose the problem.The OptiView analyzers make it easy to troubleshoot intermittent problems with advanced triggering and filtering to capture the traffic before, after or around the event occurrence and ensures the event is captured the first time to avoid doing random traffic captures that may not contain anything of interest.To capture a specific event the analyzer must inspect the contents of each packet to see if it matches a pattern or error message string which is indicative of the event occurring.The string matching is performed in hardware in real–time with linerate gigabit capture to ensure all the relevant packets are captured — after all, you can't analyze packets that were never captured.总共有 8 组触发器或过滤器可供使用,它们可触发无人参与的捕获以供后续分析,从而让您可以在适当的时候进行分析,而无需在事件发生时当即进行分析。

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If you highlight the device and select the Filter button, you will be provided with a screen that looks like the one in Figure 39.

图 39:Setting Up a Filter






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