On Fri, May 15, 1998 at 10:25:06PM -0600, Rick Macdonald wrote: > Nils, I'm trying to do the _exact_ same thing, except instead of PPP I > have two ethernet interfaces. And that makes all the difference because ethernet is a broadcast network not point to point as for PPP. See below.
> I believe my setup is correct and I believe that it doesn't work > because the "campus network" in my case is a cable modem and the cable > company hasn't properly set me up to use the 5 static IP addresses that > they have given me to use. > > I actually just need three IP's: two for my ethernet cards and one for > the machine on the local lan. > > Here I've numbered my IPs just like your campus example, but I've added > the third address, 1.2.3.3, for my second ethernet card (for my local > lan) where the other fellow is using PPP. > > If you don't mind eyeballing this, I'd be very grateful! > > #eth0 is the cable modem side. The hardware address in the arp > #command is the one from my eth0 interface (the cable modem side). > > # configure the IP address, netmask and broadcast address. > /sbin/ifconfig eth0 1.2.3.1 netmask 255.255.255.0 broadcast 1.2.3.255 > # add a network route to point to it: > /sbin/route add -net 1.2.3.0 device eth0 > # Add a default route. > /sbin/route add default gw 1.2.3.254 ok so far. > arp -s 1.2.3.2 00:10:4B:1E:A4:1B pub This is ok too. but see option 2) below > # eth1 is the Win95 local lan side: > > /sbin/ifconfig eth1 1.2.3.3 netmask 255.255.255.0 broadcast 1.2.3.255 This won't work. you have two devices (eth0 and eth1) both with the same network (1.2.3.0) and the same netmask. The kernel can't know where to put the packages. You could try: 1) ifconfig eth1 1.2.3.1 pointopoint 1.2.3.2 route add -host 1.2.3.2 device eth1 and as the 1.2.3.2 host is a win95 box, that certainly can't handle ethernet in pointopoint mode, you need arp -s 1.2.3.0 <hardware address of eth1> netmask 255.255.255.0 pub I never tried that. I don't know if ethx interfaces like to be or may be put at all in pointopoint mode. Could make sense however with a twisted Twisted pair... 2) (This one needs a few more addresses, but it is clean and will work) ifconfig eth0 1.2.3.4 netmask 255.255.255.0 broadcast 1.2.3.255 route add -net 1.2.3.0 device eth0 ifconfig eth1 1.2.3.1 netmask 255.255.255.252 broadcast 1.2.3.3 route add -net 1.2.3.0 device eth1 and on the win95 side set IP address 1.2.3.2, netmask 255.255.255.252 and default gateway 1.2.3.1 I hope win95 understands netmasks that are not on byte boundaries ... If not, use IP 1.2.3.2, netmask 255.255.255.0, default gateway 1.2.3.1 and add arp -eth1 -s 1.2.3.0 <hardware address of eth1> netmask 255.255.255.0 pub as setup command on the linux box. Nils -- *-----------------------------------------------------------------------------* | Quotes from the net: L> Linus Torvalds, W> Winfried Truemper | | L>this is the special easter release of linux, more mundanely called 1.3.84 | | W>Umh, oh. What do you mean by "special easter release"?. Will it quit | * W>working today and rise on easter? *
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