Date: Wed, 18 Jun 2003 09:42:34 -0400 From: Steve Shorter <steve@nomad.lets.net> To: net@freebsd.org Subject: arp "bug" ? Message-ID: <20030618134234.GA84032@nomad.lets.net>
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Howdy! I have a nfs booted server (FreeBSD 4.5p24) with local disk for data/swap. It has 2 network interfaces configured as follows .... Jun 18 08:16:18 <14.6> db0 /kernel: fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 Jun 18 08:16:18 <14.6> db0 /kernel: inet 192.168.10.11 netmask 0xffffff00 broadcast 192.168.10.255 Jun 18 08:16:18 <14.6> db0 /kernel: ether 00:d0:b7:c9:c5:f0 Jun 18 08:16:18 <14.6> db0 /kernel: media: Ethernet autoselect (100baseTX <full-duplex>) Jun 18 08:16:18 <14.6> db0 /kernel: status: active Jun 18 08:16:18 <14.6> db0 /kernel: fxp1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 Jun 18 08:16:18 <14.6> db0 /kernel: inet 192.168.20.11 netmask 0xffffff00 broadcast 192.168.20.255 Jun 18 08:16:18 <14.6> db0 /kernel: ether 00:b0:d0:49:ba:05 Jun 18 08:16:18 <14.6> db0 /kernel: media: Ethernet autoselect (100baseTX <full-duplex>) Jun 18 08:16:18 <14.6> db0 /kernel: status: active Twice in the last 24 hours it logged the following arp messages Jun 18 07:57:12 <1.3> db0 /kernel: arp: 00:b0:d0:49:ba:05 is using my IP address 192.168.10.11! Jun 18 08:00:39 <1.3> db0 /kernel: arp: 00:b0:d0:49:ba:05 is using my IP address 192.168.10.11! Jun 18 08:04:17 <1.3> db0 /kernel: arp: 00:b0:d0:49:ba:05 is using my IP address 192.168.10.11! Jun 18 08:07:06 <1.3> db0 /kernel: arp: 00:b0:d0:49:ba:05 is using my IP address 192.168.10.11! I seems that the MAC address of the fxp1 interface is being confused somehow with the IP of the fxp0 interface. Since this interface is the root fs the machine hung and had to be power cycled. I don't see why this error should happen, both interfaces are on different subnets ie. fxp0 - 192.168.10.11/24 and fxp1 - 192.168.20.11/24. I have some 4.6.2 servers that also log similar messages, but I've been ignoring them up to now cause it never was a "problem". Is this a bug? or is there a misconfiguration or other fix? thanx - steve
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