General Networking Troubleshooting Tips

• You must know what is "NORMAL" for your system
• Start with a visual inspection
• A divide-and-conquer approach is ideal when multiple fault can lead to a common symptom
• Failure hypotheses should be testable-be definitive about parameter of the test
• Please do not blinded by subjectivity-open your eyes and mind
• Layered troubleshooting approach

modern communication networks are modeled around architecture layer

matching a symptom to the root-caused layer is a critical step in rapid diagnosis and restoration

identifying the specific fault within the root-cause layer is icing on the cake!