[flesso]

Originally Posted by Fidget

Yes, nameservers should actually be set up in pairs on the same C class, its makes some sense because there can be momentary delays (especially in a shared hosting environment) during a single request for one ns but when asking again (as in the case of 2 ns records pointing to same C class) the delay would often be gone. This goes against a certain RFC, maybe it should be updated.

If name server should be setup in the same class C, how come nobody does? As far as I'm aware, many hosts have their name servers in separate classes, e.g. the nameservers for eukhost.com are in separate classes. The whole idea of it is that if theres a power outage in one data centre, then it doesn't affect the second nameserver which should be in a separate data centre. So overall, it's not down to IP class, it's down to the physical location of each name server, take me for an example, I will only ever have mine in the US, one is on the east coast, other is on the west coast.

Also, it would be hard for an IP from a separate class to be assigned to the VPS Hosting, normally because of the setup with the dns servers for the IP range.