Date: Fri, 07 Dec 2001 09:03:20 -0800 From: Lars Eggert <larse@ISI.EDU> To: Anders Hagman <anders.hagman@netplex.se> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: Nat through two DSL Message-ID: <3C10F658.6070001@isi.edu> References: <5.0.2.1.0.20011207131945.009fe1d0@mail.training.telia.se>
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Anders Hagman wrote: > I want to load share between two ADSL modems using a NAT/Firewall. > > Computer 1 \ > \ /-- ADSL 1 > \ / > Computer 2 ------ Wireless LAN --- Firewall/NAT - > . / \ > . / \-- ADSL 2 > Computer 10/ > > The ADSL are 500k links and I want to load share on session by session. > Can I do NAT between an inside interface and two outside interfaces > acting in a round robin fashion? This may not be the good idea you'd think on first glance. If one of the paths has a slightly different RTT (and they're pretty much guaranteed to), you'll see out-of-order delivery at the receiver. I remember seeing some study that showed that TCP doesn't react too nicely under such conditions (it works, but not at peak performance). Lars -- Lars Eggert <larse@isi.edu> Information Sciences Institute http://www.isi.edu/larse/ University of Southern California To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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