Wifi Problem I can't solve.

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  • Zyxel_Melen
    Zyxel_Melen Posts: 4,895 image  Zyxel Employee
    Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - Switch Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate
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    Hi @jef

    I want to check more details on the ping test.

    1. Does your PC connect to WiFi or connect to LAN with cable?
    2. What's your topology between the firewall, AP, and clients(phone and PC)? If there has switch between the firewall and AP, please also share the model of the switch with us.
    Zyxel Melen


  • jef
    jef Posts: 102 image  Ally Member
    First Comment Third Anniversary
    edited July 6
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    PC connects to LAN with cable.
    Firewall to Switch TL-SG116 (This switch is where the PC is connected).
    Switch to Switch over cable thus TL-SG116 to TL-SG108.
    The AP is plugged into the TL-SG108 with a POE+ injector.
    The Phone I was testing on was WIFI only.
    The clients are all WIFI.
    When I had the 700 USG on the bench, it was still using the patch panel for the AP and the injector.
    The path to the AP would have been basically the same.

    We had a long week-end being 4th of July in the US.
    And today everything has been rock solid all day.
    And nothing I do (connect, disconnect, moved to a different area) changes that it is all working very well today.
    Ping tests both ways that were failing are fine all day "Monday" July 6th.

    So…. maybe it healed over the long weekend? Nothing has changed, unless something timed out somewhere and now everything is routing correctly.

    Screenshot_2026-07-06_14-19-26.png

    If it stays like this then the problem is gone.

    Screenshot_2026-07-06_14-37-36.png

    That is as good as it gets on a 1G network for us. Lan and Wifi are getting similar results now.

  • jef
    jef Posts: 102 image  Ally Member
    First Comment Third Anniversary
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    2 days and wifi is working.
    Not sure what changed to make everything work nicely.
    Assuming from the questions asked the idea was that it was something between the AP and the USG, a switch or another device that was causing the problem.
    One of the switches is smart, the other is not. Both are running in an unmanaged mode.

    I clicked on so much stuff (trying anything, turning things on and off) over the last few weeks I'm not sure what might have caused or cured the problem. I am not even sure if it was a wifi problem or coincidence.

    Thanks for the support!