Kurt Lieber wrote:

> Hey all --
> 
> I'm trying to help a fellow gentoo developer solve a problem he's having.
> He is unable to get decent broadband speed where he lives and, for various
> reasons, needs to get faster upstream transfer speeds than he can
> currently.  One thought was to get multiple slower lines and combine them.
> 
> Any network load balancing solutions out there that might help?  I've
> already checked:
> 
> http://lartc.org/howto/lartc.rpdb.multiple-links.html
> 
> But this won't help as it chooses a single route for each transfer.  He
> needs to find a way to spread traffic across two (or more) links, even for
> a single file transfer (like an ISO).  So, when transferring a single 1GB
> file, he needs a solution that will send packets across each available
> link.
> 
> Any ideas/links/suggestions?

There's bound to be similar functionality available in Linux somewhere, 
but I remembered OpenBSD's pf supporting something like this. It 
supports address pooling and round-robining between multiple outbound 
connections.

  http://www.openbsd.org/faq/pf/pools.html#outgoing

Usually something like this might be done using BGP and some routing 
magic to set policy on routing out through these. If you were to 
investigate setting this up, Quagga (formerly zebra) has a bpgd and so 
does OpenBSD (introduced in 3.5 or 3.6, don't remember. Now a userland 
bgpd native to the OS.)

DS