Date: Thu, 4 Jan 2001 08:23:32 GMT From: Cliff Sarginson <cliff@raggedclown.net> To: cjclark@alum.mit.edu, "Brent B.Powers" <powers@b2pi.com>, David Kelly <dkelly@hiwaay.net>, Tim Gustafson <tim@falconsoft.com>, freebsd-questions@FreeBSD.ORG Subject: Re: Two NICs In FreeBSD Message-ID: <E14E5gK-0004Vv-00@post.mail.nl.demon.net>
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> On Thu, Jan 04, 2001 at 01:47:37AM -0500, Brent B.Powers wrote: > > >>>>> "David" == David Kelly <dkelly@hiwaay.net> 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. > Increase bandwidth ? A pipe doesn't increase it's width just because you try to pour more water into it. At least not under the conventional laws of this particular universe... Cliff > 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 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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