USG1100 - AP offline

Matt10669
Matt10669 Posts: 20  Freshman Member
Zyxel Certified Network Administrator - Security First Comment Second Anniversary
in Security

Hi, in my wifi net I have some Access Points that went offline (NWA5121 and WAC500 types). I tried to reboot them but nothing happened. Can you help me? Thank you

ap_screenshot.jpg

All Replies

  • smb_corp_user
    smb_corp_user Posts: 168  Master Member
    5 Answers First Comment Friend Collector Second Anniversary

    You say “I tried to reboot them but nothing happened.” — What sort of reboot did you perform? Only via GUI, or physical reboot by power off & on again? Are there any changes in the LED light status on any of the devices?

  • mMontana
    mMontana Posts: 1,389  Guru Member
    50 Answers 1000 Comments Friend Collector Fifth Anniversary

    Can you ping the APs?

    Are these APs PoE-powered?

  • Matt10669
    Matt10669 Posts: 20  Freshman Member
    Zyxel Certified Network Administrator - Security First Comment Second Anniversary
    edited February 2023

    They are all PoE powered and the switches are all ok. AP LED are on and blinking (green/yellow). I made a physical reboot disconnecting the Rj45 plug from the switches that feed the power.

    I can ping the APs.

  • mMontana
    mMontana Posts: 1,389  Guru Member
    50 Answers 1000 Comments Friend Collector Fifth Anniversary

    When the status of the APs is erratic, the USG1100 is at high cpu/memory usage? (more than 95%)?

    Are in use GS-1900 switches for PoE?

  • WJS
    WJS Posts: 155  Master Member
    5 Answers First Comment Friend Collector Second Anniversary
    edited February 2023

    Have you tried to reset AP ? Not sure what's your sec interval of lights (find the pic) . First of all, you may show arp table to ensure if AP is address 192.168.4.16 ? I mean maybe the address is fetched by other device at that moment

    Screenshot 2023-02-23 112548.jpg

    then you can capture packets between firewall's LAN and filter AP address to check if there are negotiation packets.

  • morezh
    morezh Posts: 10  Freshman Member
    Zyxel Certified Network Engineer Level 1 - Security First Comment Friend Collector

    Do you have enough AP Licenses?

  • smb_corp_user
    smb_corp_user Posts: 168  Master Member
    5 Answers First Comment Friend Collector Second Anniversary

    Would be interesting to see what this case is about, what causes this issue. Could it be an IP address availability issue, or license issue, or if it could be a communication issue between the devices (for example caused by some issue in the management OS GUI). Looking forward to a resolution.

  • Matt10669
    Matt10669 Posts: 20  Freshman Member
    Zyxel Certified Network Administrator - Security First Comment Second Anniversary

    I'm checking my licence status. I forgot I need iCard licence for additional AP (USG1100 contains only licence for 8 APs). Thank for all your kind suggestions. I'll let you know.

  • mMontana
    mMontana Posts: 1,389  Guru Member
    50 Answers 1000 Comments Friend Collector Fifth Anniversary

    Missing license helps to have APs issues…

  • morezh
    morezh Posts: 10  Freshman Member
    Zyxel Certified Network Engineer Level 1 - Security First Comment Friend Collector
    https://community.zyxel.com/en/discussion/comment/48913#Comment_48913


    After 14 years of Zyxel and about 8 of them with USGs/ATPs/NXCs as WLAN controllers, it's obvious when exactly 8 APs are online 😉

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