Date: Fri, 23 May 1997 05:04:44 +0100 From: Brian Somers <brian@awfulhak.org> To: Archie Cobbs <archie@whistle.com> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: rtinit: wrong ifa Message-ID: <199705230404.FAA02511@awfulhak.demon.co.uk> In-Reply-To: Your message of "Thu, 22 May 1997 16:31:20 PDT." <199705222331.QAA09008@bubba.whistle.com>
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> > I have a fairly recent RELENG_2_2 kernel. Suppose I want to number > interfaces "lo1" and "ed0" like this: > > lo1: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384 > inet 207.76.205.82 netmask 0xffffffff > ed0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > inet 207.76.205.82 netmask 0xffffff00 broadcast 207.76.205.255 > ether 00:60:61:01:03:ec You're much better off setting up an alias on lo0 instead of config'ing another lo. You can do it with a GENERIC kernel (rc.conf even has an example of this) and it dodges the rtinit error that you're seeing. I actually do this for the source address of my tun0 interface. It's also my `hostname` IP address, and without it X has a couple of problems ! > Huh? You want to know why the heck I'm doing this?? OK... :-) > > The problem I'm trying to solve is that I want the address 207.76.205.82 > to always exist on *some* interface, because I've got services binding > to it explicitly (as opposed to INADDR_ANY) -- but the "ed0" interface > may be going up or down. > > Remember that point to point interfaces gladly allow the local address > to exist on another interface as well. This is the desired effect... > > Some questions.. > > Question #1: Should this be allowed? Yep. > Question #2: Does FreeBSD allow this? It seems to work... Yep. > Question #3: Why does the following message appear on the console > after ifconfig'ing lo1? > > rtinit: wrong ifa (0xf083b700) was (0xf07e7580) 'cos someone added it about a year ago to warn against conflicting interfaces. If you use a lo0 alias, this message doesn't appear. > Question #4: Is it anything to worry about? Loads, but it's not relevent to this discussion :) > Thanks, > -Archie > > ___________________________________________________________________________ > Archie Cobbs * Whistle Communications, Inc. * http://www.whistle.com -- Brian <brian@awfulhak.org>, <brian@freebsd.org> <http://www.awfulhak.org>; Don't _EVER_ lose your sense of humour....
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