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WUM_113639's avatar
WUM_113639
Icon for Nimbostratus rankNimbostratus
Jul 21, 2014

F5 GTM Replacement at Primary and DR sites

Hello,

 

Our existing GTM units have reached EOS, so we have bought two new GTM units.

 

Old (Existing = BIGIP 1500) units can not be upgraded to version 11.x, whereas New units (BIGIP 4200)can not have version 11.x

 

We have to different site, where we will replace the units, Primary and DR sites.

 

Question 1: I am facing issues in migrating the GTM configuration to the new version, Is there any documented procedure that we can follow to migration version 10 GTM configuration to version 11.

 

Question 2: How can we replace two GTM at two different site with minimal impact to the services. - Can we do the activity one site at a time, if yes, then what do we need to do so that the services should not get impacted at all.

 

1 Reply

  • Hamish's avatar
    Hamish
    Icon for Cirrocumulus rankCirrocumulus

    How big is your config?

     

    For

     

    1. I'd create a new service. I haven't tried it, but you may not be able to cluster GTM 11.x and 10.x together. if not it's not fatal, simply write a script to read v10 and update the v11 configs (I'd doit in real-time rather than 1 offs).

       

    2. For replacement, I'd get the new service up and running. DO my testing, have the script running from 1 doing the sync between v10 and v11. Then when you're happy it all works, swing the delegations for your domain to the new IP addresses (Or if you're behind a NAT'ing firewall, change the NAT).

       

    As long as you're not having to replace the existing GTM IP's with the new GTM directly (i.e. move the IP's from old to new), you should be able to achieve a cutover without any outage or degradation of service.

     

    If you're running your GTM's inline instead of as a delegation, the same thing should also work (But I don't do that, so don't guarantee I've caught all the gotchas).

     

    H