Hi - lets say I loose the primary DNS server in a DR situation. - And lets say hypathetically I dont have a secondary DNS server set in the IP settings on a server.
The dns server I have set on the server/s points to the 1 interface IP of the failed DNS server.
Is there a way to set this up better in a redundant sense - say point the servers to an IP that will allow me to centrally change to a new non failed DNS server. and not have to change the DNS server IP set in all the servers.
Also hypathetically if I had another DNS server that was ok in a DR situation - Could I simply just add the "primary failed DNS server/s IP address as a secondary IP address to a good DNS server. - The clients with hard coded DNS server IP would then communicate DNS ok to this new DNS server via the secondary IP.
I know I should just have secondary DNS set in all servers - Im just not convinced 1 this has been done on the 100's of servers - or in fact all would be ok if the primary DNS server was down/failed.