Upgrading and Replacing aged GTMs in multiple data centers
Hi all,
I have been tasked to replace two aging GTMs in two separate data centers. They are operating stand alone but are performing zone transfers to each other.
One is being totally decommed (as we are turning up a GTM in a 3rd DC) and the other is simply being replaced with new hardware.
The problem comes in that I know nothing of GTMs and very little on DNS. My F5 knowledge comes from upgrading F5s that run LTM and supporting them.
What would be the most efficient way to go about this task?
So far I have the following:
- Upgrade existing GTMs to current code
- Ensure replacement devices are on current code
- Stand up New GTM and perform zone transfer to it
- Shutdown GTM that will be replaced with new hardware
- Replace shutdown GTM with new hardware
- Decomm GTM that ISN'T being replaced
I think my logic is sound enough as we will have continuous DNS capabilities and not drop below 2 active devices at any given time.
However, I don't know the pitfalls, am unsure of how to set up DNS transfer (we are running BIND) and overall don't know the best way forward.
Thanks in advance for any assistance!