How to set the network connection using linux with 2 redundant

Posted on 2006-04-10
Last Modified: 2010-08-05
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.
Question by:domdig
    LVL 16

    Accepted Solution

    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.
    LVL 3

    Assisted Solution

    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.

    Featured Post

    How to run any project with ease

    Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
    - Combine task lists, docs, spreadsheets, and chat in one
    - View and edit from mobile/offline
    - Cut down on emails

    Join & Write a Comment

    I have seen several blogs and forum entries elsewhere state that because NTFS volumes do not support linux ownership or permissions, they cannot be used for anonymous ftp upload through the vsftpd program.   IT can be done and here's how to get i…
    Note: for this to work properly you need to use a Cross-Over network cable. 1. Connect both servers S1 and S2 on the second network slots respectively. Note that you can use the 1st slots but usually these would be occupied by the Service Provide…
    In this seventh video of the Xpdf series, we discuss and demonstrate the PDFfonts utility, which lists all the fonts used in a PDF file. It does this via a command line interface, making it suitable for use in programs, scripts, batch files — any pl…
    In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor ( If you're interested in additional methods for monitoring bandwidt…

    734 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    20 Experts available now in Live!

    Get 1:1 Help Now