2 AP stopped working with GS1900-24EP

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SwitchAnon
SwitchAnon Posts: 8  Freshman Member
First Comment Friend Collector
in Switch

Two of my access points (Unifi) have no internet when plugged in to the switch GS1900-24EP. It used to work just fine. I have three more AP's that works fine with the switch.

How can I fix this problem?

Information:

Switch: GS1900-24EP

Firmware: 2.7.3

My AP's have worked perfect for years with the switch.

The AP's works great if plugged into the router (no switch).

I have reset the AP's.

POE power and cables is not a problem.

It does not matter if I change the port and cables.

When plugged into to the switch I will get internet for about a minute and then it "shuts down" (no or super slow internet).

The AP have the right MAC address and I can't see any duplicates in the switch web UI (MAC table).

The port status is, State: Enable, Up, Auto-1000M.

Any ideas?

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All Replies

  • Zyxel_Melen
    Zyxel_Melen Posts: 3,494  Zyxel Employee
    Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - Switch Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate

    Hi @SwitchAnon,

    Could you upgrade the switch firmware first since it is not the latest one? Firmware link

    If this issue happens again after firmware upgrade, since you changing ports/cables are still the same, please help download the tech support log and share it with me in a private message.

    image.png
    Zyxel Melen


  • SwitchAnon
    SwitchAnon Posts: 8  Freshman Member
    First Comment Friend Collector
    https://community.zyxel.com/en/discussion/comment/77139#Comment_77139

    I did upgrade the switch to the latest firmware and rebooting. And it dit not working. I have send you a log file.

  • mMontana
    mMontana Posts: 1,432  Guru Member
    Zyxel Certified Network Administrator - Security Zyxel Certified Network Administrator - Switch 50 Answers 1000 Comments

    Hi, you said "Two of my access points (Unifi)"

    Which model of APs?

    Also, you said "The AP's works great if plugged into the router (no switch)."

    Which router?

  • PeterUK
    PeterUK Posts: 3,879  Guru Member
    100 Answers 2500 Comments Friend Collector Seventh Anniversary
    edited May 4

    Are you powering the AP's by the switch?

    Did you save your config if at any time you rebooted the switch?

  • SwitchAnon
    SwitchAnon Posts: 8  Freshman Member
    First Comment Friend Collector
    https://community.zyxel.com/en/discussion/comment/77168#Comment_77168

    Unifi U6 LR and U6 Lite. They worked fine for years plugged into the switch.

    It is a basic router/gateway from my ISP (Technicolor TG799vn v2). Cant see any information in the router settings that the IP/MAC is blocked in any way.

    When the AP is plugged into the switch they get IP and I can ping the AP.

  • SwitchAnon
    SwitchAnon Posts: 8  Freshman Member
    First Comment Friend Collector
    https://community.zyxel.com/en/discussion/comment/77169#Comment_77169

    I don´t. I powering the AP with POE injectors. Have tried without the injectors as well.

    Have not saving any config.

  • PeterUK
    PeterUK Posts: 3,879  Guru Member
    100 Answers 2500 Comments Friend Collector Seventh Anniversary

    So likely the switch was setup to run them AP's but you did not save the config on device when it got rebooted so might need to setup the VLANs again.

  • Zyxel_Melen
    Zyxel_Melen Posts: 3,494  Zyxel Employee
    Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - Switch Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate

    Might not lacking of VLAN configuration, since he can get internet for about a minute and then it "shuts down" (no or super slow internet).

    Hi @SwitchAnon,

    I found a U6-Lite to connect to my GS1900-24EP, and the speedtest result shows the upload speed is normal.

    image.png

    May I know your AP's firmware version? My test AP's firmware version is 6.2.41.14083.

    Also, could you test in an isolated network? Since I noticed other ports connect devices, this could cause low throughput when testing.

    Zyxel Melen


  • Zyxel_Melen
    Zyxel_Melen Posts: 3,494  Zyxel Employee
    Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - Switch Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate

    Hi @SwitchAnon,

    Could you also share your complete topology? Since we are unsure which AP (mac or port) has the issue and which doesn't, the complete topology will help us clarify this issue.

    Also, when this issue happens, could you help to ping the AP, switch, router, and the Internet? We want to clarify which part of the no Internet issue is stuck.

    Zyxel Melen


  • SwitchAnon
    SwitchAnon Posts: 8  Freshman Member
    First Comment Friend Collector
    https://community.zyxel.com/en/discussion/comment/77246#Comment_77246

    I have the latest firmware on the two APs that have stopped working. And also the Unifi network app and Zyxel switch.

    6.6.78 for U6-Lite

    6.6.78 for U6-LR

    UniFi Network Application 9.1.120 for Windows

    The topology is:

    Router > Technicolor TG799vn v2 / Unifi Cloud Key 2 > Zyxel Switch GS1900 > 4-5 AP Unifi (2 U7 Wall Pro, 1 U6 LR and 1 U6 Lite). The two U7 Wall Pros work perfect with the switch.

    When I have the AP connected with the switch I can ping the AP (U6 LR).

    When I connect a brand new Unifi AP it works great.

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