Not all of your nameservers are in different subnets. Single point of failure

Posted by user2118559 on Server Fault See other posts from Server Fault or by user2118559
Published on 2013-11-09T19:24:42Z Indexed on 2013/11/09 21:56 UTC
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dns

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nameserver

Using VPS hosting and dynadot (domain registrar) DNS. Checked domain name with http://www.intodns.com and get some warnings

Different subnets   WARNING: Not all of your nameservers are in different subnets

and

Different autonomous systems    WARNING: Single point of failure

As understand to avoid the warning must have second Ip4 address and both the addresses must point to different servers? If both Ip addresses point to the same server, it does not help?

I mean each server has own Ip address. If one server down, then visitors can access website (files) on another server? Is this the reason why need more than one Ip?

Tried to point website to 2 ip addresses and after some time get warning from uptimerobot Connection Timeout

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