Date: Wed, 7 Mar 2007 19:07:18 +0100 (CET) From: Oliver Fromme <olli@lurza.secnetix.de> To: freebsd-stable@FreeBSD.ORG, dudu.meyer@gmail.com Subject: Re: Bridging problems on IP address conflict Message-ID: <200703071807.l27I7ItU060994@lurza.secnetix.de> In-Reply-To: <d3ea75b30703070746n35e7ccd0t9d4a6e00387db810@mail.gmail.com>
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Eduardo Meyer wrote: > Peter Jeremy wrote: > > Eduardo Meyer wrote: > > > bridge0: flags=8043<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 > > > ether ac:de:48:df:0d:8c > > > priority 32768 hellotime 2 fwddelay 15 maxage 20 > > > member: fxp0 flags=3<LEARNING,DISCOVER> > > > member: em0 flags=3<LEARNING,DISCOVER> > > > > > > bridge1: flags=8043<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 > > > ether ac:de:48:fe:cd:41 > > > priority 32768 hellotime 2 fwddelay 15 maxage 20 > > > member: xl1 flags=3<LEARNING,DISCOVER> > > > member: xl0 flags=3<LEARNING,DISCOVER> > > > > > > And my system constantly reports: > > > > > > arp: 00:13:20:1c:33:22 is using my IP address XX.YY.ZZ.KK! > > > > > > several (thoundsands of) times. In fact this ARP is my own fxp0 > > > interface, and this is the only interface that has this IP. What > > > should I do? Ass IP on the bridge0 interface instead of the fxp0 > > > bridge member? Or anything else? > > [...] > > This may be indicative of a loop in your switch network - is there any > > way that packets leaving fxp0 can re-appear on em0, xl0 or xl1? > > 5.5-STABLE system. The topology: > > - em0 and xl0 crossover (straight from router) to freebsd bridge > - fxp0 and xl1 on a common switch (maybe causing a loop?) Yes, that's a loop. Packets leaving fxp0 can be sent back by the switch to your xl1. You should fix your topology. Best regards Oliver -- Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M. Handelsregister: Registergericht Muenchen, HRA 74606, Geschäftsfuehrung: secnetix Verwaltungsgesellsch. mbH, Handelsregister: Registergericht Mün- chen, HRB 125758, Geschäftsführer: Maik Bachmann, Olaf Erb, Ralf Gebhart FreeBSD-Dienstleistungen, -Produkte und mehr: http://www.secnetix.de/bsd "One of the main causes of the fall of the Roman Empire was that, lacking zero, they had no way to indicate successful termination of their C programs." -- Robert Firth
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