Messages in this thread | | | Date | Sun, 17 Aug 2003 12:51:01 -0400 | From | David T Hollis <> | Subject | Re: [2.4 PATCH] bugfix: ARP respond on all devices |
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Carlos Velasco wrote:
>On 17/08/2003 at 16:28 Alan Cox wrote: > > > >>Linux doesn't issue "bad" requests. Linux will reply when it is >>asked for an address that it owns, as per RFC826, unless you chose >>to change the behaviour with things like arpfilter. >> >> > >We are not talking about ARP Replies, we are talking about ARP >Requests. >You can see the Richard post here, same issue I reported several weeks >ago: >http://marc.theaimsgroup.com/?l=linux-net&m=106094924813337&w=2 > >== > On eth0, we see: > >11:23:55.650514 0:4:75:ca:c4:ef Broadcast arp 42: arp who-has >10.10.10.1 >tell 212.xxx.yyy.9 >== > >Linux is sending an ARP Request to a LAN where the source IP address of >the packet has not any sense in that IP network. >And, at least, 2 RFCs are stating that other devices should not reply >to this packet. Currently know Cisco, Foundry; possibly others, and >possibly others coming as ARP storms are not desired. > >Regards, >Carlos Velasco > > >- >To unsubscribe from this list: send the line "unsubscribe linux-kernel" in >the body of a message to majordomo@vger.kernel.org >More majordomo info at http://vger.kernel.org/majordomo-info.html >Please read the FAQ at http://www.tux.org/lkml/ > > Check out: http://www.linuxvirtualserver.org/docs/arp.html. I understand the problem you're talking about. It's not a 'bug', it's a feature! You need to use the hidden interface approach to have the back end system not broadcast it's MAC for the virtual IP.
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