How to set the network connection using linux with 2 redundant

We currently have a complex application that we host ourselves. This application is hosted on our own server and is accessible on the Internet via a domain name.

What we want to do is to have 2 fully redundant ADSL connections to the server. So if one ISP fails the other connection will pick up and continue. The end result we are trying to achieve is an always-on Internet connection to the server.
domdigAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

BlazCommented:
What kind of application/server do you have? What kind of clients are involved?

One general option is to have a DNS with extremly short TTL and to change the DNS record to the second ADSL link IP when the primary link goes down. That is if the clients resolve the server via DNS.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
evangineerXCommented:
You don't say what distro you are using or what your network configuration is, so I can't be more specific, but one thing you might what to check out is "channel bonding", it allows the creation of a virtual NIC with an IP address that is shared across two real NICs.  This allows load-balancing and failover across the two NICs.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Linux Networking

From novice to tech pro — start learning today.