Re: Networking -- use of two Internet connections for one server with round robin DNS -- web okay, but should I do mail this way too?

[Andrew McGlashan <andrew.mcglashan@affinityvision.com.au>]

Hi,

Camaleón wrote:
> On Sat, 09 Jul 2011 08:33:23 +1000, Andrew McGlashan wrote:
>
> (...)
>
> > What I am thinking of doing is making the two MX records both at the
> > same level number, 10, and having that do round robin as well (again,
> > just the one mail server, accessible via both connections).  Does anyone
> > see any issues with this idea?  Both public IPs in use will have rDNS
> > setup.  My theory is that half the email will come in via one connection
> > and half via the other one.  Outgoing email will just use one of the
> > connections.
> >
> > Any ideas / comments / other things to consider?
>
> Here you have some approaches for round robin and balacing MX records:
>
> http://www.zytrax.com/books/dns/ch9/rr.html

Thanks, that was along the lines I was thinking.  Although I am looking 
at the same ONE server being accessible via multiple public routes.  Not 
having 2 or 3 different servers managing the load via some form of 
co-operation.

Now a DNS related question.

Can rDNS lookups for different IPs return the same result such as 
"mail.example.com" or must each IP have it's own unique PTR record name?

--
Kind Regards
AndrewM

Andrew McGlashan
Broadband Solutions now including VoIP