Date: Fri, 3 Apr 2009 20:32:31 -0400 From: Tom Ierna <tom@shockergroup.com> To: Anuj Singh <anujhere@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: mac arp moved from-to DOS? Message-ID: <2270680C-DB97-4291-95F0-73FFE436B636@shockergroup.com> In-Reply-To: <3120c9e30904031611l668e27f6vaf5ff6be15510f47@mail.gmail.com> References: <3120c9e30904031611l668e27f6vaf5ff6be15510f47@mail.gmail.com>
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On Apr 3, 2009, at 7:11 PM, Anuj Singh wrote: > 4 03:23:19 fbsd7 kernel: arp: 10.139.7.15 moved from 00:22:19:ae:ea:0d > to 00:22:19:ae:ea:0f on age0 > Apr 4 03:23:19 fbsd7 kernel: arp: 10.139.7.15 moved from > 00:22:19:ae:ea:0f to 00:22:19:ae:ea:0d on age0 > > 10.139.7.15 is some windows machine... Does this Windows machine have two Ethernet cards plugged into the same network? It looks like your FreeBSD machine is seeing that IP address switch between two MAC addresses. This can be indicative of a network loop between the interfaces on the machine with that IP address, or a DHCP client fight. I've also seen this (harmlessly) manifest with certain FreeBSD firewalls in bridged mode. -Tom
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