From mboxrd@z Thu Jan 1 00:00:00 1970 From: "David S. Miller" Subject: Re: Change proxy_arp to respond only for valid neighbours Date: Mon, 9 Feb 2004 13:45:51 -0800 Sender: netdev-bounce@oss.sgi.com Message-ID: <20040209134551.3bd533a2.davem@redhat.com> References: <20040209121926.6f016ebf.davem@redhat.com> <4027FE27.9020102@candelatech.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: ja@ssi.bg, netdev@oss.sgi.com, kuznet@ms2.inr.ac.ru Return-path: To: Ben Greear In-Reply-To: <4027FE27.9020102@candelatech.com> Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org On Mon, 09 Feb 2004 13:39:51 -0800 Ben Greear wrote: > Arp requests are always broadcasts, so promisc changes nothing, > right? Unicast probes are possible. If it is broadcast/multicast then pkt_type will be PACKET_{BROAD,MULTI}CAST. The existing ipv4 proxy-arp code is saying (as I read it) to not delay the response if this is a unicast probe. This is one of the behaviors that Julian is modifying slightly. For everyone's edification, when looking at changes Julian is suggesting, realize that his interests lie in IPVS like applications, so consider the corner case situations that such setups might be interested in and you'll see clearly the impetus for all of his ARP change proposals :-)