Date: Mon, 11 Feb 2002 12:50:25 -0600 From: Dan Nelson <dnelson@allantgroup.com> To: M+P International <sales@m-p.co.uk> Cc: questions@FreeBSD.ORG Subject: Re: Bridging two ethernet networks Message-ID: <20020211185024.GU44170@dan.emsphone.com> In-Reply-To: <01a201c1b32c$bd964780$54000064@damien> References: <01a201c1b32c$bd964780$54000064@damien>
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In the last episode (Feb 11), M+P International said: > The person that set up our network made an error and set the internal IP's > to 100.0.0.xxx and not to 10.0.0.xxx. This has not been a problem till now. > I cannot just re-number because some of the old stuff has no documentation, > so I'd like to run both 100.0.0.xxx and 192.168.1.xxx on the same network > while I re-number what I can. > > So I built a bridge with 2 Intel 10/100's, added options BRIDGE and re-built > the kernel. Both cards run in promiscuous mode, but neither network can see > the other. I haven't implemented options IPFIREWALL yet. > Is a bridge the right thing in this situation? Or have I just not built the > bridge correctly? From a '100' box I get 'No route to host' when I ping a > '192' pc. I have not given either card an IP address as suggested by the > documentation. You want a router, not a bridge. If both subnets are on the same physical ethernet, simply desgnate one of your faster machines as "the router", add an alias IP to the 100.0.0 network on its main NIC, and enable routing ( gateway_enable="YES" in /etc/rc.conf ). If both subnets are on different physical ethernets, then you can use your existing machine. Turn off bridging, assign each NIC an IP, and enable routing. In either case, you will want to designate your router as the default gateway for all the PCs (using the appropriate IP depending on which subnet the client PC is on). The reason the '100' box gave you a "no route to host" error is because it had no default route, so it cannot talk to any machines not on its own subnet. Your ping packet never even left the machine. -- Dan Nelson dnelson@allantgroup.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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