| To: | "Alan Cox" <alan@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [2.4 PATCH] bugfix: ARP respond on all devices |
| From: | "Carlos Velasco" <carlosev@xxxxxxxxxxxx> |
| Date: | Sun, 17 Aug 2003 17:59:54 +0200 |
| Cc: | "Lamont Granquist" <lamont@xxxxxxxxxxxxxxxx>, "Bill Davidsen" <davidsen@xxxxxxx>, "David S. Miller" <davem@xxxxxxxxxx>, bloemsaa@xxxxxxxxx, "Marcelo Tosatti" <marcelo@xxxxxxxxxxxxxxxx>, netdev@xxxxxxxxxxx, linux-net@xxxxxxxxxxxxxxx, layes@xxxxxxxxx, torvalds@xxxxxxxx, "Linux Kernel Mailing List" <linux-kernel@xxxxxxxxxxxxxxx> |
| In-reply-to: | <1061134091.21886.40.camel@dhcp23.swansea.linux.org.uk> |
| References: | <Pine.LNX.3.96.1030728222606.21100A-100000@gatekeeper.tmr.com> <20030728213933.F81299@coredump.scriptkiddie.org> <200308171509570955.003E4FEC@192.168.128.16> <200308171516090038.0043F977@192.168.128.16> <1061127715.21885.35.camel@dhcp23.swansea.linux.org.uk> <200308171555280781.0067FB36@192.168.128.16> <1061134091.21886.40.camel@dhcp23.swansea.linux.org.uk> |
| Sender: | netdev-bounce@xxxxxxxxxxx |
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 |
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