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Thornid's avatar
Thornid
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Jan 27, 2024

GTM/DNS Upgrade Question

Hello all

We are planning on upgrading our GTM/DNS devices from v14 -> v15. They are in a sync group. There are also 4 x LTM systems (2 x HA pairs) that the GTMs monitor. The LTMs run v14.

We are not planning on upgrading the LTMs yet.

Currently all devices run the same big3d version. After the upgrade the GTMs will have a newer version of big3d. 

My question is - will the newer big3d version on the GTMs be backwards compatible with the older big3d versions on the LTMs?

Thank you.

application delivery
  • Michael_Saleem's avatar
    Michael_Saleem
    Icon for MVP rankMVP
    Jan 27, 2024

    F5 recommends that the LTMs have the same or higher version of big3d than the GTMs (otherwise you may experience iQuery communication issues).

    If you experience iQuery communication issues, you should verify whether the remote BIG-IP systems are running the same or newer big3d version as the monitoring device (DNS / GTM or Enterprise Manager).

    https://my.f5.com/manage/s/article/K13703

    • Thornid's avatar
      Thornid
      Icon for Nimbostratus rankNimbostratus
      Jan 27, 2024

      Thank you Michael. 

      Another question please: when running the big3d_install command from the GTM -> LTM should we target each individual LTM self IP? In other words we treat them not as a HA pair but single devices in this regard?

  • Michael_Saleem's avatar
    Michael_Saleem
    Icon for MVP rankMVP
    Jan 27, 2024

    Yep, target each individual LTM so that big3d is updated on both units in the HA pair (you can target a non-floating  self IP on each BIG-IP system in the HA pair, or their respective management IP addresses; it's totally up to you).

     

    Example (GTM > LTM)

    run util bash

big3d_install <TARGET LTM-1 NON-FLOATING SELF IP> <TARGET LTM-2 NON-FLOATING SELF IP> ...

     

    Then log on to each LTM and verify the big3d version has been updated

    run util bash

big3d -v
    • Thornid's avatar
      Thornid
      Icon for Nimbostratus rankNimbostratus
      Jan 27, 2024

      Brilliant. Thank you Michael. Simple but effective advice right here.