Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

Oreoluwa's avatar
Oreoluwa
Icon for Altocumulus rankAltocumulus
Dec 24, 2019

TOO MANY TRIGGERED EMAIL ALERTS BY HEALTH MONITOR

Hi guys,   I have successfully setup email alerts on my F5 BIGIP in my production environment and it works but there is an issue. For every second the monitor goes down or for every second the mo...
application delivery
big-ip
LTM
SWJO's avatar
SWJO
Icon for Cirrostratus rankCirrostratus
Dec 26, 2019

It seems that your server setting wasn`t good.

If you using http monitor, insert close session syntax.

or most of case, your server`s kernal value related with tcp is root cause.

  • Oreoluwa's avatar
    Oreoluwa
    Icon for Altocumulus rankAltocumulus
    Jan 02, 2020

    i don't understand this SWJO. Could you explain better please? I am interested in this

    • SWJO's avatar
      SWJO
      Icon for Cirrostratus rankCirrostratus
      Jan 02, 2020

      likewise

      GET /test.html HTTP/1.1\r\nUser-Agent: \r\nHost: 127.0.0.1\r\nConnection: Close\r\n\r\n

    • Oreoluwa's avatar
      Oreoluwa
      Icon for Altocumulus rankAltocumulus
      Jan 02, 2020

      This config is for the health monitor ?​

    • SWJO's avatar
      SWJO
      Icon for Cirrostratus rankCirrostratus
      Jan 02, 2020

      that configuration is for http service.

       

      when health check down triggered, get tcpdump server and bigip both.

       

      You need to diagnose the problem correctly.