From owner-freebsd-questions Wed Jan 3 22:58:19 2001 From owner-freebsd-questions@FreeBSD.ORG Wed Jan 3 22:58:17 2001 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mailhost01.reflexnet.net (mailhost01.reflexnet.net [64.6.192.82]) by hub.freebsd.org (Postfix) with ESMTP id 1112837B400 for ; Wed, 3 Jan 2001 22:58:17 -0800 (PST) Received: from rfx-64-6-211-149.users.reflexcom.com ([64.6.211.149]) by mailhost01.reflexnet.net with Microsoft SMTPSVC(5.5.1877.197.19); Wed, 3 Jan 2001 22:56:21 -0800 Received: (from cjc@localhost) by rfx-64-6-211-149.users.reflexcom.com (8.11.0/8.11.0) id f046vvI16265; Wed, 3 Jan 2001 22:57:57 -0800 (PST) (envelope-from cjc) Date: Wed, 3 Jan 2001 22:57:57 -0800 From: "Crist J. Clark" To: "Brent B.Powers" Cc: David Kelly , Tim Gustafson , freebsd-questions@FreeBSD.ORG Subject: Re: Two NICs In FreeBSD Message-ID: <20010103225757.F95729@rfx-64-6-211-149.users.reflexco> Reply-To: cjclark@alum.mit.edu References: <5.0.0.25.2.20010103233521.00a58890@esther.falconsoft.com> <200101040626.f046Qqp18465@grumpy.dyndns.org> <14932.7305.161918.432919@Max.B2Pi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0i In-Reply-To: <14932.7305.161918.432919@Max.B2Pi.com>; from powers@b2pi.com on Thu, Jan 04, 2001 at 01:47:37AM -0500 Sender: cjc@rfx-64-6-211-149.users.reflexcom.com Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Thu, Jan 04, 2001 at 01:47:37AM -0500, Brent B.Powers wrote: > >>>>> "David" == David Kelly writes: > > David> Tim Gustafson writes: > >> Hello > >> > >> I just installed two NIC cards into my FreeBSD machine that are > >> on the same LAN, each with a different IP. However, I keep > >> getting this sort of message in my syslog: > > David> I fail to understand why one would put two NICs on the same > David> LAN. What does this do for you that an aliased address on > David> one NIC won't do? Is this something you have to do to NT to > David> fool it into appearing on the net with multiple IP > David> addresses? > > Someplace I've a sun doc that discusses how to do this on SunOS and > Solaris. The reason you might want to do it might include redundancy > (I've had NIC's die on me, sometimes from overheat) This is not the way to do it. The IP address of a fried card will still be unreachable. > and possibly increasing bandwidth. Two NICs on one net from one machine can only hurt your bandwidth in a collision domain. The _network_ is limited to 10Mb/s or 100Mb/s or whatever. More NICs cannot increase that. It can increases collisions and slow you down. > In fact, for the second reason, it's relatively > commonly done with PPP links, which amounts to two NIC's on the same > network. Huh, how's that? -- Crist J. Clark cjclark@alum.mit.edu To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message