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Forum Discussion

williwow's avatar
williwow
Aspirant
Apr 04, 2016
Solved

Additional switch breaks network performance/connectivity

Hi Community and Experts!   I have a strange problem: adding an additional switch breaks (totally) network performance.   This is my setup: * central FTTH router (DHCP server) - connection to...
Troubleshooting
  • DaneA's avatar
    DaneA
    Apr 12, 2016

    Hi williwow,

     

    I think having a packet capture using Wireshark would help isolate the problem as to why the problem happens only when the GS105v5 is connected but not on the GS108v3.  I suggest that you install Wireshark on your PC(s)/laptop(s) to capture packets.  Kindly download Wireshark from this link.  You may use this link as reference guide on how to use Wireshark.
     
    For the captured packets to be analyzed, kindly open an online case with NETGEAR Support regarding this problem.  Then, attach the captured packets from Wireshark via the online case you have opened for it to be forwarded to the engineering team and be analyzed.
     
     
    Regards,  
     
    DaneA
    NETGEAR Community Team
williwow's avatar
williwow
Aspirant
Apr 05, 2016

Hi DaneA

 

thanks for the suggestions. I will check for the model and do the tests you proposed (exchanging the central 8-port switch ist difficult as all ports are wired, but I have another identical in my home-office which I will use for replacing the 5-port device).

 

Thanks again and I will follow up with the results and details (it will take maybe 1-2 working days).

 

Williwow

williwow's avatar
williwow
Aspirant
Apr 08, 2016

Hi DaneA,

 

I made some investigations as suggested and results are:

* 8-port-switch is GS108v3

* 5-port-switch is GS105v5

 

Transfer tests:

* on both switches I obtain a file transfer speed close to 100 MByte

 

Problem analysis:

* replacing the problematic GS105 with the GS108 works, so the line of devices_working_ is:

HP microserver --> GS108  --(wired connection with two plugs/patchpanel in house)--> GS108 --> dreambox-sat-receiver WORKS!

* re-substituting the second GS108 (same cables being used) with the GS105 shows again the problems described (not working)

 

Current workaround is to use the GS105 in my home office (but I am out of ports on this - and hoping there will be no future problems)) and use the GS108 for my dreambox (just 2 ports used thus wasting 6 ports!).

 

Do you have any suggestions? I don't think the GS105 is broken, but the GS108 does the trick?

 

thanks!

 

Williwow

  • DaneA's avatar
    DaneA
    NETGEAR Employee Retired
    Apr 10, 2016

    Hi williwow,

     

    Just to verify, you have also tried using another GS105 switch from your home office?  Does same problem occur on the other GS105 switch?

     

    For me, since the GS105 is also an unmanaged switch just like the GS108v3, it should also work.  

     

     

    Regards,

     

    DaneA

    NETGEAR Community Team

    • williwow's avatar
      williwow
      Aspirant
      Apr 12, 2016

      Hi DaneA,

       

      no - I am out of switches :-)

      Prior to the GS105 I tried this model from D-Link: DGS-105/E 5-Port Layer2 Gigabit Switch. As this switch showed the problems described I sent it back to the seller and purchased the more expensive Netgear GS105 hoping that it would perform well. Unfortunately the GS105 showed the same problems. I have no other device to test on. It's very strange that the GS108v3 works whereas the GS105v5 in this configuration not.

      Now I am using the GS105 in my home office and the GS108v3 connected to the dreambox receiver. Everything is fine, but it is not satisfying that the root cause is still unclear. Maybe the v5 models have a latency problem? The throughput in my home office setting is OK.

       

      Thanks

       

      Williwow

      • DaneA's avatar
        DaneA
        NETGEAR Employee Retired
        Apr 12, 2016

        Hi williwow,

         

        I think having a packet capture using Wireshark would help isolate the problem as to why the problem happens only when the GS105v5 is connected but not on the GS108v3.  I suggest that you install Wireshark on your PC(s)/laptop(s) to capture packets.  Kindly download Wireshark from this link.  You may use this link as reference guide on how to use Wireshark.
         
        For the captured packets to be analyzed, kindly open an online case with NETGEAR Support regarding this problem.  Then, attach the captured packets from Wireshark via the online case you have opened for it to be forwarded to the engineering team and be analyzed.
         
         
        Regards,  
         
        DaneA
        NETGEAR Community Team

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