GTM failure causing customer impact

With multiple servers any of them can be asked at any time depending on the ldns doing the query, you can't rely on order. My advise while you are in a period of instability and troubleshooting would be to decrease your ttl so you can make a manual update if necessary. I wouldn't deploy a hybrid gslb/standard dns architecture. It's complicated enough with one solution.

 

 

When you say only one is operational..does that mean the box is completely down, or you're having trouble with the GTM daemon? If the latter, you might be able to utilize an iRule to check for a response, and if not present or invalid, pass off to the local bind instance.