Does FreeBSD issue messages about MAC/IP conflicts?
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? FreeBSD-8.0-STABLE, ath0 interface. Yuri ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
Re: Does FreeBSD issue messages about MAC/IP conflicts?
On Sun, Jan 3, 2010 at 6:40 PM, Yuri 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. -- Glen Barber ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
Re: Does FreeBSD issue messages about MAC/IP conflicts?
Glen Barber wrote: > On Sun, Jan 3, 2010 at 6:40 PM, Yuri 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. ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
Re: Does FreeBSD issue messages about MAC/IP conflicts?
my curiousity is howd he get duplicate mac addresses On Sun, Jan 3, 2010 at 9:02 PM, wrote: > Glen Barber wrote: > > On Sun, Jan 3, 2010 at 6:40 PM, Yuri 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. > ___ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org" > ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
Re: Does FreeBSD issue messages about MAC/IP conflicts?
On 04/01/2010 4:30 π.μ., Outback Dingo wrote: > my curiousity is howd he get duplicate mac addresses > > On Sun, Jan 3, 2010 at 9:02 PM, wrote: > > > Changed using ifconfig - maybe by a script? like ifconfig re0 link ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
RE: Does FreeBSD issue messages about MAC/IP conflicts?
>From: owner-freebsd-hack...@freebsd.org >[mailto:owner-freebsd-hack...@freebsd.org] On Behalf Of Outback Dingo > >my curiousity is howd he get duplicate mac addresses > The most common cause that I've seen is duplicating virtual machines and not telling VMWare (or whatever you use) to re-jigger the virtual MAC address. ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
