From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephan von Krawczynski Subject: Re: [2.4 PATCH] bugfix: ARP respond on all devices Date: Tue, 19 Aug 2003 19:12:46 +0200 Sender: netdev-bounce@oss.sgi.com Message-ID: <20030819191246.027061dd.skraw@ithnet.com> References: <353568DCBAE06148B70767C1B1A93E625EAB58@post.pc.aspectgroup.co.uk> <20030819145403.GA3407@alpha.home.local> <20030819170751.2b92ba2e.skraw@ithnet.com> <20030819085717.56046afd.davem@redhat.com> <20030819185219.116fd259.skraw@ithnet.com> <20030819095302.7213ddd5.davem@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: willy@w.ods.org, richard@aspectgroup.co.uk, alan@lxorguk.ukuu.org.uk, carlosev@newipnet.com, lamont@scriptkiddie.org, davidsen@tmr.com, bloemsaa@xs4all.nl, marcelo@conectiva.com.br, netdev@oss.sgi.com, linux-net@vger.kernel.org, layes@loran.com, torvalds@osdl.org, linux-kernel@vger.kernel.org Return-path: To: "David S. Miller" In-Reply-To: <20030819095302.7213ddd5.davem@redhat.com> Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org On Tue, 19 Aug 2003 09:53:02 -0700 "David S. Miller" wrote: > On Tue, 19 Aug 2003 18:52:19 +0200 > Stephan von Krawczynski wrote: > > > On Tue, 19 Aug 2003 08:57:17 -0700 > > "David S. Miller" wrote: > > > > > "Be liberal in what you accept, and conservative in what you send" > > > -Jon Postel > > > > If I understood what Richard said in this thread Jon just shot you > > down. The conservative way to _request_ arp would definitely be to > > request it from the "correct" subnet, because as a sender you ought > > to give credit to knowing that "bad" boxes out there won't answer if > > you do otherwise. > > In the ARP request we are using the source address in the packet we > are building for output. > > If ARP doesn't work using that source address, we can only assume IP > communication is not possible either. > > It is the box not responding to this ARP which is preventing > communication not the box creating the ARP request. Please read my example from other email. Very simple to prove you wrong here. Regards, Stephan