From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Sebastian J. Bronner" Subject: Re: bridge not routing packets via source bridgeport Date: Tue, 04 Jan 2011 09:25:52 +0100 Message-ID: <4D22D990.7030409@d9t.de> References: <4D220CFB.5060300@d9t.de> <1294080135.2892.1152.camel@edumazet-laptop> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: netdev@vger.kernel.org, Daniel Kraft To: Eric Dumazet Return-path: Received: from sj232.sb.d9t.de ([94.186.148.168]:54819 "EHLO zimbra.pool.b.d9tcloud.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752371Ab1ADIZ6 (ORCPT ); Tue, 4 Jan 2011 03:25:58 -0500 In-Reply-To: <1294080135.2892.1152.camel@edumazet-laptop> Sender: netdev-owner@vger.kernel.org List-ID: On 03.01.2011 19:42, Eric Dumazet wrote: > Le lundi 03 janvier 2011 =C3=A0 18:52 +0100, Sebastian J. Bronner a =C3= =A9crit : >> we recently upgraded from 2.6.32.25 to 2.6.35.24 and discovered that= our >> virtual machines can no longer access their own external IP addresse= s. >> Testing revealed that 2.6.34 was the last version not to have the >> problem. 2.6.36 still had it. But on to the details. [ Details snipped ] > random guess: maybe rp_filter hits you ? >=20 >=20 > With 2.6.36, a new SNMP counter was added,=20 > "netstat -s | grep IPReversePathFilter" Thanks for your guess, Eric. Unfortunately, that didn't change anything. According to the documentation at http://lartc.org/howto/lartc.kernel.html that parameter is to prevent _responses_ leaving through a different interface that the original packet came in on. So, I wouldn't expect it to have any impact on _routed packets_. In my original e-mail, I forgot to mention something I noticed while debugging: If i put the bridge into promiscuous mode, then suddenly the packets ar= e routed. # ip link set promisc on dev virbr1 Cheers, Sebastian --=20 *Sebastian J. Bronner* Administrator D9T GmbH - Magirusstr. 39/1 - D-89077 Ulm Tel: +49 731 1411 696-0 - Fax: +49 731 3799-220 Gesch=C3=A4ftsf=C3=BChrer: Daniel Kraft Sitz und Register: Ulm, HRB 722416 Ust.IdNr: DE 260484638 http://d9t.de - D9T High Performance Hosting info@d9t.de