I also used "echo 1 > /proc/sys/net/ipv4/conf/default/arp_filter" to limit the arp reply. It works fine with unique cast ping. When I use broadcast ping, ping -b 10.0.0.255 will generate 8 replies from the same ip addres, since we have 8 x 1gige network interfaces from the same linux system on the same subnet. (video application). Anyone know how to correct this behavior? I can filter the incoming arp requestion from the driver level, but am looking for a lazy "echo 1 > /proc/.... " type of solution. On Thu, 25 Nov 2004 14:33:15 +0000, Illtud Daniel <illtud.daniel@xxxxxxxxxxx> wrote: > Henrik Nordstrom wrote: > > > On Wed, 24 Nov 2004, Lawrence MacIntyre wrote: > > > >> It's a routing optimization for the network. Even if your dual-homed > >> machine isn't a router, it's still on both segments. The alternative is > >> that the net has to route your packet to the other segment. > > Erm no, the alternative is that both segments mind their own business > unless I'm routing either through the host or another router. > > > Except that there will never be a ARP request for an IP which belongs to > > the other segment if your network is built correctly. > > Exactly. Unless both segments feature the same private IP address > range, which isn't impossible nor disallowed. > > Anyway, not mine to reason why. Thanks for explaining this to me. > > -- -Tony Having fun with FPGA HW + ppc + Linux - : send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html