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Shruti's avatar
Shruti
Icon for Nimbostratus rankNimbostratus
Jun 14, 2023

GTM LTM Virtual Discovery

Hi Team,

I am building a new GTM which is running on version 15 and few LTM which I added under GTM using bigip_add commands and they are running on version 14.. I have also established iquery communication using self IP's. I also have virtual discover enabled but still LTM VIPs are not being auto poplulate..please provide ur suggestions

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  • Mohamed_Salah_'s avatar
    Mohamed_Salah_
    Icon for MVP rankMVP
    Jun 14, 2023

    Hello,

     

    Please check the below points:

    1. Check that both GTM and LTM are having same big3d.
    2. Check iqdump command output from the GTMs to the LTM.
    3. make sure communication is going through the Self IP and not the management of any BIG-IP device.
    4. the autodiscover feature is disabled if NAT is activated on the LTM, so check whether NAT enabled or not, and if yes, unfurtunately, you will need to make it manually.

     

    Thanks,

    • Shruti's avatar
      Shruti
      Icon for Nimbostratus rankNimbostratus
      Jun 16, 2023

      Idump command shows configuration details from LTM but GTM under server list doesn't show it.

      • Mohamed_Salah_'s avatar
        Mohamed_Salah_
        Icon for MVP rankMVP
        Jun 16, 2023

        Hello,

        Are the virtual server configured on the LTMs configured in non default route domain? if yes, you need to check "expose route domain options" when you are trying to discover the virtual servers.

  • Ben_Novak's avatar
    Ben_Novak
    Icon for Employee rankEmployee
    Jun 15, 2023

    It's lengthy, but I suggest you start with this article.

    K13690: Troubleshooting BIG-IP DNS synchronization and iQuery connections (11.x - 17.x)

    https://my.f5.com/manage/s/article/K13690

    Side notes;

    - NTP is critical, anything over 30 seconds of skew between devices will cause problems.  This one is easy to overlook.

    - If another F5 LTM has the same IP:PORT vs it will conflict and prevent discovery

    • Shruti's avatar
      Shruti
      Icon for Nimbostratus rankNimbostratus
      Jun 16, 2023

      NTP seems fine, I can see configuration when I run iqdump command but in GUI no details under server list