We've been trying to get a back-up nameserver+webserver up for a while now. Also been trying to test it but no luck so far. We're definately no experts in this area so therefor my question here.
We have set up both servers with nameservers and a records like this:
ns1.domain.com A 123.456.7.89
ns2.domain.com A 123.456.7.89
ns3.domain.com A 987.654.3.21
123.456.7.89 NS ns1.domain.com
123.456.7.89 NS ns2.domain.com
987.654.3.21 NS ns3.domain.com
Both servers have the same domain setup with these values in plesk. The ns3 has de ip address of the back-up server and ns1+ns2 have the ip address of the original server. At our nameserver provider we have added the 3 nameservers.
We've been trying to test when we take down our dns+apache service at out original service. We were hoping that when we entered the domain name it would go to the back-up server but instead we just get a browser error.