We have two ISP's example: 8.3.56.xxx and 102.36.100.xxx. Lets say 102.36.100.xxx is the primary IP address for our domain and it works fine. We have two DNS servers, one primary and one secondary, on this ISP connection. Can we move our seconded DNS server (NS2) to the other ISP for a fail over if our connection to the primary fails. We have added the second ISP address in the reverse lookup zones, and the A recorded in the Forward Lookup zones for the secondary IP. We have also added a second MX record along with a matching A record for our email on both DNS Servers. Am I going in the right direction? Or is this even possible?
We need to have availability for email and access to our website if the connection to our primary ISP fails (it has done so).
Thanks in advance