Date: Fri, 19 May 2000 02:10:50 -0400 From: "Crist J. Clark" <cjc@cc942873-a.ewndsr1.nj.home.com> To: Travis Leuthauser <travis@winconx.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Multiple NIC's Message-ID: <20000519021050.A66352@cc942873-a.ewndsr1.nj.home.com> In-Reply-To: <017b01bfc0ef$78ad4000$20503cd0@travis>; from travis@winconx.com on Thu, May 18, 2000 at 12:35:34PM -0500 References: <017b01bfc0ef$78ad4000$20503cd0@travis>
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On Thu, May 18, 2000 at 12:35:34PM -0500, Travis Leuthauser wrote: > I am running 3.1 Stable. I am trying to add a 2nd NIC in my news server. I > have a 3com (xl0) currently in it with the following configuration: > > xl0: > IP: xxx.xxx.xxx.12 netmask 255.255.255.128 > alias: xxx.xxx.xxx.14 netmask 255.255.255.255 > both IP's are in the same subnet. Cool. That's the way to go. > I want to add a second 3com NIC (xl1) with the .14 address, thus making my > configuration: > > xl0 xxx.xxx.xxx.12 netmask 255.255.255.128 > xl1 xxx.xxx.xxx.14 netmask 255.255.255.128 Uh-oh... > Both of these will be plugged into a 100Mbit hub for the next week or so > until I get a Catalyst in place. ^^^ Eep! You have two NICs on one host in a collision domain. This can only hurt your network performance. Do not do that. > Now, for the problem, when I add the second NIC and change my configuration > to match the above, I begin getting arp messages such as > > /kernel: arp: xxx.xxx.xxx.12 is on lo0 but got reply from (MAC address of > xl0) on xl1 > /kernel: arp: xxx.xxx.xxx.32 is on xl0 but got reply from > (MAC address of win. 98 box @ .32) on xl1 > > Should I configure the second NIC with a /32 subnet add just add an explicit > route? As long as you have a collision domain, only use one NIC. -- Crist J. Clark cjclark@home.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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