Date: Wed, 19 May 2004 12:59:59 -0700 From: Mike Hunter <mhunter@ack.Berkeley.EDU> To: Russell Adams <russ@500records.com> Cc: freebsd-net@freebsd.org Subject: Re: arp: <some ether addr> is using my IP address <some IP addr> again. Message-ID: <20040519195959.GA3046@ack.Berkeley.EDU> In-Reply-To: <1084994246.40abb2c6ef47a@500records.com> References: <1084994246.40abb2c6ef47a@500records.com>
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On May 19, "Russell Adams" wrote: > I have seen this question posted twice to the list each without any response. > Does anybody out there know if this is possible, a Yes or No, will do if you > can't offer anything else. If it is possible then how do we get rid of the > Arp/IP conflict problem. > > This is what I want to do: > > A transparent bridge with no IPs (2 NICs) > A 3rd NIC to access the box via SSH for monitoring and configuration. > > this is what I have done. > > xl0 and xl1 set up as a transparent bridge, no ips > rl0 set up as 192.168.30.254 on the LAN > Bridge is inbetween 192.168.30.1 (ROUTER to Internet) and 5500 Cisco Switch. > > I log in via SSH to configure the bridge via rl0, so far so good. I plug in the > bridge between the router and the switch via xl0 and xl1, the bridge begins to > pass packets perfectly. BUT now rl0 is not reachable via anything, no even a > ping. Login into the console for investigation I find this message: > > FreeBSD Kernel: Arp: 00:00:00:00:00 is using my IP address 192.168.30.254 > FreeBSD Kernel: Arp: 11:11:11:11:11 is using my IP address 192.168.30.254 > > The 00 and 11 MACs address representing the MAC for the 2 NICs that are part of > the bridge. 192.168.30.254 was the previously working admin interface accepting > conections via SSH. > > Below is are 2 unanswered posts that are asking the same thing but both are > regarding 4.8, I am using 5.2.1 > > > http://lists.freebsd.org/mailman/htdig/freebsd-net/2003-June/000586.html > http://lists.freebsd.org/mailman/htdig/freebsd-net/2003-December/002109.html I never had any trouble passing traffic, but I did get spurious arp error messages. In my /etc/rc.conf, I specifically disabled arp on the bridge interfaces, and the messages went away. I think I saw that suggestion on an archived mailing list post somewhere. Good luck, Mike
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