Date: Wed, 2 Jun 1999 17:47:14 -0700 (PDT) From: Dan Busarow <dan@dpcsys.com> To: cjclark@home.com Cc: zvi@zvi.t-networking.com, freebsd-questions@FreeBSD.ORG Subject: Re: 2 ethernet cards Message-ID: <Pine.BSF.3.96.990602174155.13761N-100000@java.dpcsys.com> In-Reply-To: <199906030029.UAA18383@cc942873-a.ewndsr1.nj.home.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, 2 Jun 1999, Crist J. Clark wrote: > Dan Busarow wrote, > > On Wed, 2 Jun 1999, Brad Tucker wrote: > > > I am trying to use 2 ethernet cards in my FreeBSD box. I compiled the > > > kernel to use ed0 and ed1. This all works fine, and when I start the > > > machine it recognizes them fine. The problem Im having is I want to set > > > the FreeBSD box up as a router. I want the address for ed0 to be > > > 206.117.19.2, and it is. When I try to configure ed1 to be > > > 206.117.19.126, it doesnt work. Can I have two ethernet cards on the same > > > network, and in the same box. I have half a class c > > > 206.117.19.0-206.117.19.128. I dont want to use ip masq. or a firewall. > > > > In /etc/rc.conf set > > > > router_enable="YES" > > > > Then you need to fix the netmasks on the two cards. Your rc.conf > > lines should look like > > > > ifconfig_ed0="inet 206.117.19.2 netmask 255.255.255.252" #0-4, 1&2 usable > > ifconfig_ed1="inet 206.117.19.126 netmask 255.255.255.192" #64-127, 65-126 usable > > > > Notice that you will lose almost half of your address space doing this. > > I was suprised that no one seems to have mentioned the futility in > doing all of this. The original poster is trying to cut down on > cross-talk (if I understood correctly), but he is instead putting two > interfaces on this wire where he only really needs one. How is this > "routing" (I think he is actually interested in switching) going to > help with his problem? All of the network traffic, actually more, is > still going to be there. I certainly hope he isn't puttin both interfaces on the same wire, that's not how I read it. ed0 would be on a crossover cable to the router's ethernet port. ed1 would go to the internal network. The appletalk packets will not appear on ed0. In fact only traffic destined for or from the Internet will appear on ed0 so the collisions *that his router sees* will go down. Collisions on the internal network won't change of course. Cisco's down an interface when they see too many collisions, luckily they bring it up again pretty quickly. Dan -- Dan Busarow 949 443 4172 Dana Point Communications, Inc. dan@dpcsys.com Dana Point, California 83 09 EF 59 E0 11 89 B4 8D 09 DB FD E1 DD 0C 82 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSF.3.96.990602174155.13761N-100000>