Aggregating upstream bandwidth

Discussion in 'Linux Networking' started by Draxen, Sep 23, 2003.

  1. Draxen

    Draxen Guest

    I've been using a RedHat 7.2 box to drive my ADSL line for a couple of years
    now, lovely jubbly everything's been cool.
    Now I'd like to run a webserver and the 256kbps upstream on my line is
    looking a little weedy. Ideally I'd like to double this up but an SDSL
    package will cost four times as much as my current one.

    So.....what about getting a second ADSL line installed (with a second phone
    line obviously) and bonding the available bandwidth on my firewall ? I'm not
    bothered about download speeds, just upstream. I suppose I could setup a DNS
    round-robin but I was looking for something a bit more sophisticated.

    Using linux (or anything else) could I bond two ADSL lines and get a virtual
    512kbps upstream pipe ?
     
    Draxen, Sep 23, 2003
    #1
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  2. Draxen

    Clueless Guest


    Short answer is yes, in Linux or using moderately expensive gear.
    Google Groups link here http://tinyurl.com/oc2k
    And I am planning to test a cheap Edimax router that looks like it might do
    the job but only when I find the time.

    S. Althaf
     
    Clueless, Sep 23, 2003
    #2
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  3. [Bonding ADSL Lines]
    You want to load-balance between interfaces, not between
    servers, so DNS round-robin does not help with your network
    configuration and you really need something more sophisticated.

    This should be possible, see the following link:
    http://lartc.org/howto/lartc.rpdb.multiple-links.html


    Ciao, Horst
     
    Horst Knobloch, Sep 23, 2003
    #3
  4. Draxen

    Draxen Guest

    If each interface has a seperate IP address then surely a DNS round robin
    would work, I'm not saying it'd be great load balancing but it should
    function, shouldn't it ?
    Thank you Horst, I think that'll do the job nicely to start with and also
    give me a do-able learning curve to climb :)
     
    Draxen, Sep 23, 2003
    #4
  5. In this case you need to deploy DNAT to direct the web traffic,
    coming in on both interfaces, to your server. And I originally
    thought that reversing DNAT in the outgoing direction would
    break in the presence of two interfaces / default routes.

    However in the meantime I think this should be no problem as
    long as Linux uses the two default routes in a round-robin
    fashion and your provider does no reverse path filtering.

    You are welcome.

    Jupp. :)


    Ciao, Horst
     
    Horst Knobloch, Sep 23, 2003
    #5
  6. Draxen

    UncleWobbly Guest

    you'll need a second line anyway as SDSL doesn't permit voice and data at
    the same time.
     
    UncleWobbly, Sep 23, 2003
    #6
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