Date: Mon, 19 Sep 2005 13:06:19 +0700 (ICT) From: Olivier Nicole <on@cs.ait.ac.th> To: freebsd-net@freebsd.org Subject: Re: ARP behavior in FreeBSD vs Linux Message-ID: <200509190606.j8J66JbO095192@banyan.cs.ait.ac.th> In-Reply-To: <432DA922.5030303@errno.com> (message from Sam Leffler on Sun, 18 Sep 2005 10:51:30 -0700) References: <20050919.004531.92589257.mshindo@mshindo.net> <432D9249.9090202@mac.com> <432DA0AC.8010802@thedarkside.nl> <432DA922.5030303@errno.com>
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> What Motonori Shindo described is actually the default behaviour for > Linux kernels (at least my 2.6.8-kernel does it by default). It could be > seen as a sort of proxy-arp, but only for the host itself, not other > systems. Let me try to describe when it happens. Say you have > 192.168.42.42 bound on eth0 and have eth1 connected to some ethernet > LAN. When a host on that eth1-connected LAN sends an 'arp who-has > 192.168.42.42', a Linux system will answer that arp-request with it's > eth1 MAC-address, although the IP-address is bound on eth0 and the arp > request comes in on eth0. FreeBSD obviously doesn't do this. To me, it seems that FreeBSD does just that too once bridge is enabled. Olivier
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