Date: Mon, 30 Apr 2001 21:36:09 -0700 From: "Ted Mittelstaedt" <tedm@toybox.placo.com> To: "Nick Rogness" <nick@rogness.net>, "Ken Bolingbroke" <hacker@bolingbroke.com> Cc: <questions@FreeBSD.ORG> Subject: RE: Redundant Internet connections Message-ID: <000401c0d1f8$3eb33380$1401a8c0@tedm.placo.com> In-Reply-To: <Pine.BSF.4.21.0104291600120.70248-100000@cody.jharris.com>
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>-----Original Message----- >From: owner-freebsd-questions@FreeBSD.ORG >[mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of Nick Rogness >Sent: Sunday, April 29, 2001 2:04 PM >To: Ken Bolingbroke >Cc: questions@FreeBSD.ORG >Subject: Re: Redundant Internet connections > > >On Sat, 28 Apr 2001, Ken Bolingbroke wrote: > >> >> Given a FreeBSD box with _two_ independent connections to the internet, >> and also serving as the gateway to a third, private network, how would I >> configure it to use both Internet links as "default" routes? I would >> prefer one over the other, but need it to fall back to the second if the >> first goes offline. > > > //Add backup route > # route add -net 0.0.0.0 X.X.X.X -netmask 0.0.0.0 -nostatic > > //Add primary route > # route add -net 0.0.0.0 A.A.A.A -netmask 128.0.0.0 -nostatic > # route add -net 128.0.0.0 A.A.A.A -netmask 128.0.0.0 -nostatic > > > A.A.A.A is your primary gateway and X.X.X.X is your backup > gateway. > > This does no load balancing but if interface that connects to > A.A.A.A goes down, the secondary oute will take affect. > Muh ha ha ha ha!!! (evil cackle) Yes, this is the ham-handed way to attempt this with only one tiny problem: Supposing that both interfaces into the FreeBSD router are Ethernet? (say, 2 DSL connections) A DSL modem will NOT shut down it's Ethernet interface if the DSL circuit to it goes down. What then? Or, better yet - suppose both interfaces are T1 frame relay interfaces. Those interfaces won't go down either if the LMI stays up and the PVC goes away. Ted Mittelstaedt tedm@toybox.placo.com Author of: The FreeBSD Corporate Networker's Guide Book website: http://www.freebsd-corp-net-guide.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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