Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261395AbUKXAJm (ORCPT ); Tue, 23 Nov 2004 19:09:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261399AbUKWRe6 (ORCPT ); Tue, 23 Nov 2004 12:34:58 -0500 Received: from salazar.rnl.ist.utl.pt ([193.136.164.251]:14230 "EHLO admin.rnl.ist.utl.pt") by vger.kernel.org with ESMTP id S261367AbUKWQUL (ORCPT ); Tue, 23 Nov 2004 11:20:11 -0500 Message-ID: <41A3634D.6050108@rnl.ist.utl.pt> Date: Tue, 23 Nov 2004 16:20:29 +0000 From: "Pedro Venda (SYSADM)" User-Agent: Mozilla Thunderbird 0.9 (X11/20041107) X-Accept-Language: en-us, en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Cc: linux-os@analogic.com Subject: Re: Running Ethernet without ARP References: <20041123140025.GA32447@beton.cybernet.src> In-Reply-To: X-Enigmail-Version: 0.86.0.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1571 Lines: 47 linux-os wrote: > On Tue, 23 Nov 2004, Karel Kulhavy wrote: > >> Hello >> >> man netdevice says: >> "IFF_NOARP No arp protocol, L2 deswtination address not set". >> Is it possible to run ptp Ethernet link between two Linux routers this >> way? I would like to run the link with two constraints: >> 1) no ARP protocol used >> 2) The link should continue to work even if root access to one >> computer is >> inaccessible and the NIC in the other one is replaced without changing >> it's MAC (for example because it doesn't support MAC change) >> >> Cl< > > > ARP means address resolution protocol. That's how one machine > learns about the MAC (Hardware) address of another so it can > communicate with it. Without ARP, you need to send / receive > broadcast packets (Like M$ Netboius). This means that everything > is received by everyone on the LAN and needs to be dumped on > the floor by everybody except the intended target. or somehow a static table can be built. not sure what the point would be, but I cannot see anything that would make it impossible. regards, pedro venda. -- Pedro Jo?o Lopes Venda email: pjvenda@rnl.ist.utl.pt http://maxwell.rnl.ist.utl.pt Equipa de Administra??o de Sistemas Rede das Novas Licenciaturas (RNL) Instituto Superior T?cnico http://www.rnl.ist.utl.pt http://mega.ist.utl.pt - 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/