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GF88's avatar
GF88
Aspirant
Nov 17, 2025
Solved

Only the GS308 series loses connection from the Wi-Fi router

 

When I connect a Sony Wi-Fi router(NSD-G1000T) to Port 1 of a GS308 series switch, it receives an IP address from the DHCP server and functions as a switch for the first 3-5 seconds. 

My PC connected to Port 2 of the switch can send/receive ping both the switch and the Wi-Fi router. 

 

However, after the first 3-5 seconds passed, the Wi-Fi router then disconnects from the switch. After the disconnection, my PC can ping only the switch. The Wi-Fi router is missing form PC side.

 

[Connection Map: Not work]

Sony Wi-Fi router with DHCP Server <-- Port 1--> GS308 Switch <-- Port 2 --> PC

 

 

But if I replace the GS308 switch with GS108E, it works well.

I have multiple GS308 and GS108E, I retry and test this by each device but the result was same.

It is not individual device issue, it seems to have some compatibility issue.

 

[Connection Map: Work]

Sony Wi-Fi router with DHCP Server <-- Port 1--> GS108E Switch <-- Port 2 --> PC

 

 

The GS308 seems to have some compatibility issues with Sony Wi-Fi routers.

If I could solve the problem by turning off some function of the GS308, I would be grateful.

 

I would appreciate some advice from anyone who has had a similar experience and has a solution.

 

  • GF88's avatar
    GF88
    Nov 18, 2025

    schumaku​ 

    >Ensure STP (RSTP) et all (like the Loop Prevention) are disabled, and try again.

    That (STP) setting (default: ON) was the cause of this issue!

    I didn't fully understand STP, so I couldn't fully utilize your comments.

    Thank you again for following up.

     

    I wanted VLAN functionality, but it seems I was buying a device beyond my level of knowledge. I need to learn more about the device I purchased (GS308T).

     

10 Replies

  • StephenB's avatar
    StephenB
    Guru - Experienced User
    GF88 wrote:

    When I connect a Sony Wi-Fi router(NSD-G1000T) to Port 1 of a GS308 series switch

    Are you connecting the 2.5 gbps port in the router to the switch?

     

    If so, have you tried connecting a gigabit port instead?

    • GF88's avatar
      GF88
      Aspirant

      StephenB​ 

      I tried 1.0 gbps port instead of 2.5 gbps port, but the result was not improved.

      I also tried port speed mode 1.0 gbps instead of auto. But the result was same.

      Thank you for your comment.

      • StephenB's avatar
        StephenB
        Guru - Experienced User
        GF88 wrote:

        I tried 1.0 gbps port instead of 2.5 gbps port, but the result was not improved.

        I also tried port speed mode 1.0 gbps instead of auto. But the result was same.

        Is anything else connected to the switch?  Or is it just the router and the PC?

         

        Does the PC work correctly when connected directly to the router LAN port?

  • schumaku's avatar
    schumaku
    Guru - Experienced User

    A GS308 is an unmanaged switch, nothing to configure.

     

    Or are we facing any kind of GS308E, GS308EP, or GS308EPP?

     

    Unlikely with such a simple config, the Easy Smart Essentials Switches (PoE or not), but also the GS108E the OP is referring to, have a feature called LOOP DETECTION. If in doubt, disable this feature - especially if paired with some more sophisticated Mesh WiFi system, eg. used as a wireless access point.

     

    StephenB wrote:

    Are you connecting the 2.5 gbps port in the router to the switch?

     

    This has no impact on the switch at least.

    • StephenB's avatar
      StephenB
      Guru - Experienced User
      schumaku wrote:

      This has no impact on the switch at least.

      It shouldn't, unless there is a compatibility issue in the router ethernet.  Perhaps not likely, but easy to test.

       

      schumaku wrote:

      especially if paired with some more sophisticated Mesh WiFi system, eg. used as a wireless access point

      The Sony router appears to be a stand-alone router, not a mesh.  Though I can't read Japanese, so I can't get much info from the manual...

    • GF88's avatar
      GF88
      Aspirant

      schumaku​ 

      Thank you for your advice.

       

      I confirmed the setting of the GS308T.
      I had proceeded factory reset at the previous investigation procedures, and the confirmed setting: the loop protection setting was OFF.

       

      I also confirmed the settings of the Sony router, but I could not find sittings regarding these loop protection/detection functions.

       

      I am still having issues, but I appreciate your support.

      • schumaku's avatar
        schumaku
        Guru - Experienced User
        GF88 wrote:

        ...setting of the GS308T.

         

        Again a totally different beast. That's why the community does always request the exact device make and model. 

         

        These GS308T (might) have Spanning Tree Protocol (STP) enabled by default - as these are standard for business and enterprise class networking devices - something these kind of Easy Mesh and similar are simply highly incompatible (just like the Loop Prevention the GS308E does have) to these wonderful Mesh **** - albeit always calming it's IEEE compliant. All makers of these wonderful MEsh systems don't tell the uneducated customers that only so called "unmanaged" switches can be used - the reasons are Loop Prevention and even more STP.  These systems do -not- accept the same MAC address appearing on different switch ports or networks.

         

        Ensure STP (RSTP) et all (like the Loop Prevention) are disabled, and try again.

         

         

         

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