Thanks. We are going to buy (sometime in the future) a $400 hardware solution NexLand Turbo800. It does everything we need (Switched LAN ports, firewall, web config, 2 redundant/load balanced WAN ports with serial modem for 3rd redundant failover, DNS, DHCP, IPSEC pass-through, ....) Really cool and well worth the money. If we can get this load balancing thing working we can avoid this purchase.
----- Original Message ----- From: "Ted Fines" <[EMAIL PROTECTED]> To: "Steve Westerhouse" <[EMAIL PROTECTED]>; "Chris Wilkes" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Thursday, February 28, 2002 11:39 AM Subject: Re: How to aggregate bandwidth from 2 DSL modems? > There is a commercial product that does exactly this. The product is > called FatPipe, and you can check it out at http://www.fatpipeinc.com. I > happen to know they just run on a Linux box of some kind (OpenLinux, I > think). I know you're not looking for a commercial solution, but if the > product does what it says it does, it CAN be done. > > --On Thursday, February 28, 2002 11:24 AM -0600 Steve Westerhouse > <[EMAIL PROTECTED]> wrote:rr > > > Thanks for your reply. > > > > I am aware that spreading packets across two ips could mess things up but > > I'd expect that the Linux gateway would avoid this. My expectations are > > that the gateway would keep track of bandwidth in use on both pipes and > > whichever one had the smallest utilization would be chosen for the next > > transfer. This would have to use connection tracking to work properly. I > > don't think it would matter for UDP based apps but I suppose it's really > > up to the app. > > > > > > ----- Original Message ----- > > From: "Chris Wilkes" <[EMAIL PROTECTED]> > > To: <[EMAIL PROTECTED]> > > Sent: Thursday, February 28, 2002 11:12 AM > > Subject: Re: How to aggregate bandwidth from 2 DSL modems? > > > > > >> On Thu, Feb 28, 2002 at 10:33:57AM -0600, Steve Westerhouse wrote: > >> > I have two DSL modems (each has same bandwidth) connected to my RedHat > > 7.1 > >> > Linux gateway. There are 3 NICs in the system (1 LAN, 2 WAN). How can > > I > >> > combine the bandwidth of both of these modems? I have a feeling this > > can be > >> > accomplished using iptables in some way. I understand that any given > > file > >> > transfer will not be able to exceed the bandwidth of an individual DSL > >> > modem. The real advantage comes in when there are > 1 concurrent > >> > connections. > >> > >> Usually if you have two pipes like this you ask your single ISP to bond > >> them together. However that's usually done with traditional links like > >> ISDN and T1s. I highly doubt that ISPs are doing this bonding with DSL. > >> > >> So you're left with using them as individual pipes, which I think you > >> understand as you mentioned bandwidth limits on the one DSL line. > >> > >> I'm not sure how to do this dynamically with DSL but you could > >> statically NAT the odd users out DSL #1 and the even ones out DSL #2. > >> That's pretty cheasy and doesn't help out much. > >> > >> You can take a look at the Advanced Routing Howto: > >> http://www.linuxdoc.org/HOWTO/Adv-Routing-HOWTO.htm > >> http://www.linuxdoc.org/HOWTO/Adv-Routing-HOWTO-10.html > >> The 2nd link describes "TEQL" for "True|Trivial Link Equalizer" -- > >> however both machines have to run Linux. > >> > >> What kind of things are you looking to load balance? You have to be > >> aware that most things could break if you suddenly come from a different > >> IP in the middle of a session. For example you're playing Quake and > >> suddenly your IP switches or half your packets are coming from a > >> different IP. > >> > >> I would look into different proxy servers to do this job for you. > >> Looking over the Squid pages you can probably do something with > >> parents/siblings and routing those over different links. > >> > >> Chris > >> > >> > > > > > > > > > >
