From owner-freebsd-hackers Fri Dec 7 9:50:33 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from mailgw3a.lmco.com (mailgw3a.lmco.com [192.35.35.24]) by hub.freebsd.org (Postfix) with ESMTP id 06CAA37B416 for ; Fri, 7 Dec 2001 09:50:28 -0800 (PST) Received: from emss01g01.ems.lmco.com ([129.197.181.54]) by mailgw3a.lmco.com (8.8.8/8.8.8) with ESMTP id MAA02922 for ; Fri, 7 Dec 2001 12:50:26 -0500 (EST) Received: from CONVERSION-DAEMON by lmco.com (PMDF V5.2-33 #38886) id <0GNZ00801IVK1H@lmco.com> for freebsd-hackers@freebsd.org; Fri, 7 Dec 2001 09:50:08 -0800 (PST) Received: from cui1.lmms.lmco.com ([129.197.1.64]) by lmco.com (PMDF V5.2-33 #38886) with ESMTP id <0GNZ00F0CIVG0G@lmco.com> for freebsd-hackers@freebsd.org; Fri, 07 Dec 2001 09:50:05 -0800 (PST) Received: from lmco.com (CONNECTICUT1.lmms.lmco.com [129.197.23.84]) by cui1.lmms.lmco.com (8.11.0/8.9.2) with ESMTP id fB7Ho3608562 for ; Fri, 07 Dec 2001 09:50:04 -0800 (PST) Date: Fri, 07 Dec 2001 09:49:38 -0800 From: rick norman Subject: Re: Nat through two DSL To: freebsd-hackers@freebsd.org Message-id: <3C110131.CF806ED2@lmco.com> MIME-version: 1.0 X-Mailer: Mozilla 4.77 [en] (WinNT; U) Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7BIT X-Accept-Language: en References: <5.0.2.1.0.20011207131945.009fe1d0@mail.training.telia.se> <3C10F658.6070001@isi.edu> <20011207170742.GB80922@virtual-voodoo.com> Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG What would be nice would be to load balance on a per connection basis, not a per packet basis, between the two modems. Any ideas how to do this ? Rick Steve Ames wrote: > On Fri, Dec 07, 2001 at 09:03:20AM -0800, Lars Eggert wrote: > > 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). > > Is it even possible to do use two upstream paths for redundancy? I tried > (very briefly while I had two broadband connections while switching from > one to the other) to get that to work and wasn't very successful. > > -Steve > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message