Date: Thu, 26 Oct 2000 19:56:36 -0600 (MDT) From: Nick Rogness <nick@rapidnet.com> To: Bakul Shah <bakul@torrentnet.com> Cc: "Richard A. Steenbergen" <ras@e-gerbil.net>, "Ron 'The InSaNe One' Rosson" <insane@lunatic.oneinsane.net>, freebsd-net@FreeBSD.ORG Subject: Re: Multihomed Routing Message-ID: <Pine.BSF.4.21.0010261948400.29371-100000@rapidnet.com> In-Reply-To: <200010270005.e9R05ct21991@bacardi.torrentnet.com>
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On Thu, 26 Oct 2000, Bakul Shah wrote: > > > On Thu, 26 Oct 2000, Ron 'The InSaNe One' Rosson wrote: > > > > > > > Yesterday I got into a discussion with one of my asociates about if a > > > > Network has 2 Routes out how do you tell your servers to switch between > > > > the routes without having to manually go in and change them. The > > > > discussion was not how the routers/switches were going to do it but how > > > > would are FreeBSD servers no what route to take out. Would the FreeBSD > > > > servers have to run routed or some other routing based deamon to know > > > > what there gateway route is? In theory we should not have to set a > > > > default route on this network for any of our machines. > > Wouldn't listening to/soliciting router discovery ICMP > messages on your hosts take care of this? See RFC 1256. > Supposedly FreeBSD `routed' already does this. When you have > multiple routers in your network this ought to be better than > hardwiring a default gateway on your hosts. But you > shouldn't need to run RIP or OSPF on your hosts. > Sure that will work. However, consider the following: Network1 (2000 IP's) | | |---Router1 | machine1---| | |---Router2 (default gateway) What happens to Router2 when machine1 is trying to access the IP's on Router1's network? Router2 gets clogged down sending ICMP redirects for Router1 back to machine1. The problem grows exponetially[spelling] when you add more machines to the same network machine1 is on. Keep in mind, it only updates routes on machine1 for that IP...not the subnet...at least on WInBlows. Nick Rogness - Drive defensively. Buy a tank. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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