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Groups > comp.os.linux.networking > #536

Re: Multiple Internet connections

From buck <buck@private.mil>
Newsgroups comp.os.linux.networking
Subject Re: Multiple Internet connections
Date 2011-08-30 16:54 +0000
Organization Say What?
Message-ID <j3j4km01clq@news6.newsguy.com> (permalink)
References <14adndRzA-YkWsfTnZ2dnUVZ7tSdnZ2d@lyse.net> <j3gbt90l7v@news3.newsguy.com> <OpSdnRZIStted8bTnZ2dnUVZ8hmdnZ2d@lyse.net>

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David Brown <david.brown@removethis.hesbynett.no> wrote in 
news:OpSdnRZIStted8bTnZ2dnUVZ8hmdnZ2d@lyse.net:

| Would that be <http://linux-ip.net/html/> ?

Yes, but IIRC Brown authored more than is documented there and all of 
his related "stuff" is well worth studying.

The problem with flakey connections is that dead gateway detection 
("DGD"), even with Julian's patches, DOES NOT WORK.  That's because 
the gateway is alive and well but whatever is beyond it is not.  I no 
longer have multiple connections so I haven't kept current, but 
believe that there are solutions now that are able to know when one of 
multiple uplinks fails.  Perhaps "high availability" or "BalanceNG" 
might lead you to where you wish to be.  You don't want the LARTC docs 
as your primary reading because these solutions did not exist when it 
was written.

When I had multiple (all terrible) uplinks (as many as 4 at one time), 
the only way I was able to isolate the one that was down was to 
constantly 'ping -I' a reliable remote machine via a shell script and 
adjust the routing table based on the result.  I considered that shell 
script an abomination.
--
buck

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Thread

Multiple Internet connections David Brown <david.brown@removethis.hesbynett.no> - 2011-08-29 00:56 +0200
  Re: Multiple Internet connections buck <buck@private.mil> - 2011-08-29 15:40 +0000
    Re: Multiple Internet connections David Brown <david.brown@removethis.hesbynett.no> - 2011-08-29 21:38 +0200
      Re: Multiple Internet connections buck <buck@private.mil> - 2011-08-30 16:54 +0000
        Re: Multiple Internet connections David Brown <david.brown@removethis.hesbynett.no> - 2011-08-30 21:17 +0200

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