Replacing a DNS Server with F5 BIG-IP DNS
Published Feb 23, 2018
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Off the top of my head I'll be honest I am not sure. I did some research and I personally was not able to find official numbers since much of this is based on memory resources available to the BIG-IP itself. Therefor a lot will depend on platform and DNS provisioning (dedicated, nominal or minimum). With that, I can tell you one of our teams tested up to 100k zones with memory to spare. I know this is not the answer you are looking for so I will continue to try and find more official sizing information though I cannot promise it exists.