Date: Sun, 03 Jan 2010 18:02:13 -0800 From: perryh@pluto.rain.com To: yuri@rawbw.com, glen.j.barber@gmail.com Cc: freebsd-hackers@freebsd.org Subject: Re: Does FreeBSD issue messages about MAC/IP conflicts? Message-ID: <4b414c25.b%2BRuSCrExOCUOAba%perryh@pluto.rain.com> In-Reply-To: <4ad871311001031543j16aa7aa3la35be5897bb9c490@mail.gmail.com> References: <20100103154049.208253lht7g43go4@webmail.rawbw.com> <4ad871311001031543j16aa7aa3la35be5897bb9c490@mail.gmail.com>
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Glen Barber <glen.j.barber@gmail.com> wrote: > On Sun, Jan 3, 2010 at 6:40 PM, Yuri <yuri@rawbw.com> wrote: > > I accidentally had two machines having the same wifi MAC > > address. Wifi router gave them both the same local IP address > > and they both could somewhat connect to the outside world, but > > connections were flaky. > > > > No messages about IP/MAC conflicts appeared in dmesg log. > > > > Vague memories from the long ago past remind me that Windows > > was issuing IP conflict messages in the local wired network. > > > > Why doesn't FreeBSD complain at leat about the IP conflict? > > The last time I made the mistake of having two devices with the > same IP, I saw ARP messages in /var/log/messages as well as the > system console. This was around 8.0-RC1, for what it's worth. ARP will notice when two different MAC addresses both claim the same IP address, but to detect two different boxes both claiming the same MAC/IP address pair would require some other way of identifying the two boxes as different.
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