For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

Rise_77519's avatar
Rise_77519
Icon for Nimbostratus rankNimbostratus
Feb 24, 2014

dns cache resolver

Hi, when i configure a resolver cache on the f5 then can i delegate some domain names to f5 for name resolution ? Thanks,  
design
Cory_50405's avatar
Cory_50405
Icon for Noctilucent rankNoctilucent
Feb 28, 2014

It sounds like you'll want to have both of your GTMs in a sync group. That way, their configurations will be the same and no matter which GTM the query arrives at, both will provide the same resolution.

 

The authoritative DNS server that will delegate the domains to your two GTMs will need to be configured to delegate to both. When a client requests an NS record for the domain, your authoritative server will hand back both of your GTM hostnames/IP addresses. The client will then try to query one. If non-responsive, it should try querying the other. If both GTMs are non-responsive, then the query will fail.

 

You can configure global availability as your load balancing method on the GTMs. Keep in mind what that will do is just control the method which GTM responds to client queries. It won't affect how your parent authority delegates domains to your GTMs. If round robin will work, then global availability will too. Just a different balancing algorithm.