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m1kta's avatar
m1kta
On our wavelength
2 years ago
Solved

All WFH network 1GB except one segment is 100MB, puzzled.

I have checked the ports, ethernet setting etc and all report 1GB but one segment (garden office) still reports 100MB. Do a broad band test from there and you can see it.

Is there a networking tool that will help pinpoint / find (maybe ID device) where in home network a 100MB limit exists? I have eyeballed ethernet cards, all switches and cables and all settings at 1GB full duplex but still seeing 100MB limit for that one segment, very frustrating. I seem to remember seeing something but cannot remember what it was called.

It is somewhere in the infrastrure as if move a laptop from one other the other (cable connection) the speed changes.

  • Adduxi's avatar
    Adduxi
    2 years ago

    If the cable has failed, it could drop to 100mb, as this speed only needs two pairs.  1Gb needs all four pairs to work.  Both Cat 5e and Cat 6 are good for 1Gb at 100 meters distance.

5 Replies

  • carl_pearce's avatar
    carl_pearce
    Superstar
    2 years ago

    Have you directly connected a device on the ethernet cable between the garden office and a known working gigabit switch?

    • m1kta's avatar
      m1kta
      On our wavelength
      2 years ago

      Thanks Carl, that is what is most puzzling, it reports a GB connection locally at both ends. The cable between might be suspect, I thought CAT5e or CAT6 was fine for GB over 50m. Maybe should swap to dark fiber and couple fiber converters?

      I still looking for that software though, I am sure I've seen it.

      BTW VM Broadband is 250MB (reports 236MB/s with a following wind so pinch of salt on those VM numbers perhaps!) so it's local networking I am really interested in.

      • Adduxi's avatar
        Adduxi
        Very Insightful Person
        2 years ago

        If the cable has failed, it could drop to 100mb, as this speed only needs two pairs.  1Gb needs all four pairs to work.  Both Cat 5e and Cat 6 are good for 1Gb at 100 meters distance.