Every OSI layer, from cabling to ISP services. For each area involved, you give its technical data, the problems observed and the tests that failed or passed, then rank the problems by urgency. The deliverable correlates the evidence, weighs each probable cause against your tests (a failed test supports it, a passed test rules it out) and, starting with your most urgent problem, gives the investigation path, the root cause analysis, the best correction now and the corrective action to decide.
Contents
1. Evidence Correlation
2. Problem Prioritization
3. Root Cause Hypotheses
4. Optimal Investigation Path
5. Problem-by-Problem Resolution
6. Missing Diagnostic Information
What you provide
Relevant areas — The areas concerned by the incident.
Cabling — Cable type, cable length (m), cable path (from → to), then the problems seen and the tests run.
Fiber — Fibre type, connector, optical power TX (dBm), then the problems seen and the tests run.
Physical Ports — Device, ports concerned, port state, then the problems seen and the tests run.
SFP / Transceivers — Transceiver model, vendor coding, TX power (dBm), then the problems seen and the tests run.
Hardware Connectivity — Device, vendor and model, power, then the problems seen and the tests run.
Patch Panels — Patch panel, panel ports concerned, labelling matches the documentation, then the problems seen and the tests run.
7 options — A component not listed above: its name, role, vendor and configuration, then the problems seen and the tests run.
