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Ethernet Network Switch diagnostics

Test what the browser can see. Know when it cannot.

Use endpoint connectivity and timing tests to identify whether failures are device-specific or affect multiple ports before changing switch configuration.

Run these first

Relevant live checks

Browser Online Status TestCheck the browser online state, available connection hints, and a short round trip to DeviceOK.
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Browser Latency TestMeasure several browser-to-DeviceOK request round trips as a quick connection responsiveness check.
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Browser Network Timing Variation CheckRun repeated HTTP round trips to DeviceOK and show timing variation between samples.
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Network Information CheckRead browser-exposed connection type, estimated round-trip time, downlink, Save-Data state, and online status where supported.
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First diagnostic sequence

Do the high-signal checks before risky changes

  1. 1

    Check link and activity indicators on both ends

  2. 2

    Move the same client and cable to another known-good port

  3. 3

    Use the switch management interface for VLAN, PoE and error counters

What DeviceOK/browser can help check
  • Confirm endpoint web connectivity
  • Measure browser HTTP timing
  • Show limited browser network hints
What this browser page cannot prove
  • Read managed-switch port counters or VLAN state generically
  • Test PoE voltage
  • Measure cable faults without hardware