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joseph1r's avatar
joseph1r
Aspirant
Apr 30, 2023

Slow speeds

I have a GB connection to the house from AT&T, My I am running CAT5e and CAT6 in my home. 

All my rooms are getting GB wired speeds except for my office which has a Gigabit 8-port 300 Series SOHO Unmanaged Switch (GS308V3). I am consistently obtaining 94MB up/down on speed tests on my Windows 11 computer. 

 

In my other rooms, I have a Linksys Gigabit switch and a TP-Link Gigabit switch, and I am obtaining GB speeds on the systems in those rooms. 

 

This leads me to believe that the Netgear switch may be faulty.

3 Replies

  • CrimpOn's avatar
    CrimpOn
    Guru
    Apr 30, 2023

    Anything "almost 100MBps", such as 94Mbps is almost always a result of two Ethernet interfaces auto negotiating a speed of 100Mbps/Full Duplex rather than 1000Mbps/Full Duplex.  see

    https://en.wikipedia.org/wiki/Autonegotiation 

    This feature has been built into Ethernet interfaces for years (a long time).

     

    Very often, it is a result of one of the cables in the pathway having a "problem"

    • Some kink or failure in the actual cable, or
    • A problem with the connector that is crimped onto the cable, either an RJ45 Ethernet jack or an RJ45 Ethernet plug.
      Regular (i.e. inexpensive) "Cable Testers" may verify that wire connections exist, but may not be capable of testing that the connections support full speed.

    My suggestion is to try to identify which cable link is at fault:

    • Ethernet cable inside the wall
    • One of the Ethernet RJ45 jacks
    • One of the Ethernet patch cables
    • The GS-308 switch

     

    • joseph1r's avatar
      joseph1r
      Aspirant
      Apr 30, 2023

      Thank you for your response, however, I do not feel that it is applicable yet.

      I have two computers in my office that have the same issue. The cables are new, and the patch cables in the closet look fine as well.

      I have purchased a new gigabit switch which should arrive on Monday. I will switch that out and see what occurs.

      If I experience the same issue, then I would agree with your assessment.

      If I do not experience the same issue, then this would definitively point to the Netgear as the problem.

      • CrimpOn's avatar
        CrimpOn
        Guru
        Apr 30, 2023

        Any number "close to, but under 100Mbps" sort of "leaps out".  (If the speed had reported 102Mbps, for example, it could not be the auto negoriation process.)

         

        An easy test (but probably not convenient) would be to connect that computer directly to the Ethernet LAN port on the back of the router. (no patch panel, no wiring inside the walls, no switch, no patch cables).  Alas, moving desktop computers around is simply not practical.

         

        Please report "what happens".