Tell me more ×  The firm that I work for has 2 ADSL lines into
the office. We have a domain which we would like to be able to
reach our network server on. One of ADSL connections is already
a DNS entry for  We would like to use the other connection as a
backup. I know there is "round robin" DNS but that isn't a
redundancy system is it? How would you suggest we get this other
ADSL connection added to the DNS so one ADSL will act as a
failover for the other?  Example: If one of the ADSL lines goes
down, the other is used seamlessly.  Cheers Chris  share|improve
this question That's network routing, it's not something you can
do with DNS (alone). You either build it into the client, or you
build it into routing, or you put a transparent proxy in front
of your ADSL connections (i.e. before they get to your office)
and it probes and checks with routes are up. But really, you're
talking about network routing. –  EightBitTony Jul 13 '11 at
18:25 You seem to be bordering on the point where getting an AS
number, IP ad