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whisperer's avatar
whisperer
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I agree with Paulius 100%. If the F5 BIG-IPs only running GTM as dedicated module, no need for HA! Use GTM sync group and publish both listener addresses for DNS... or setup DNS anycast. If in HA, you don't have BOTH units responding to DNS (normal setup), but if both are standalone and part of the same GTM sync group, then you still have resiliency and depend on iQuery between both GTM instances and DNS for failover. If running more modules... like LTM and/or ASM the conversation changes. Most clients with run dedicated smaller devices for GTM/DNS only, and a bigger device for all other ADC functions.

Amr_Ali's avatar
Amr_Ali
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Jun 05, 2023

hello whisperer, I need to make HA between two GTM boxes at the same location ( datacenter ) not in different locations

  • JRahm's avatar
    JRahm
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    Jun 05, 2023

    Hi Amr_Ali if they are standalone GTM devices, this is not a recommended configuration. Better to make them both active and in the sync group.

    • Amr_Ali's avatar
      Amr_Ali
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      Jun 05, 2023

      so in this case when I configured them in sync group , both GTM will be active ???!!!

      is there any way to make one of them active and the other one on standby 

      • JRahm's avatar
        JRahm
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        Jun 05, 2023

        the sync group is just to make sure all configs are synced when changes are made in the sync group. The individual GTMs will get requests based on the NS records established on zones. If you really want only one to respond, then HA is the way to go, but I'm curious to understand the use case of sidelining one of them?