I'm planning to upgrade my primary dns server. To avoid a downtime i'm planning to create vps where i will have same configured dns server. Till i reboot primary dns server i'm planing to change VPS dns server's ip to what Primary dns has so all the traffic and query should answer the new vps dns server. Is this a good plan ? Actually i do not know how to perform this i'm afraid i will miss something . . . P.s i have authoritative dns zones.
All i want is to replace Primary dns server temporary to avoid downtime just need a simple way how to do this.
I'm using bind.