From mboxrd@z Thu Jan 1 00:00:00 1970 From: Evgeniy Polyakov Subject: Re: Problem: ip_forward in 2.6.27 via realtek 8169 and rt2500pci needs mtu 185 on machines in LAN Date: Fri, 24 Oct 2008 10:28:20 +0400 Message-ID: <20081024062820.GA9321@ioremap.net> References: <490127D6.8080201@jsigle.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: netdev@vger.kernel.org To: "Joerg M. Sigle" Return-path: Received: from cet.com.ru ([195.178.208.66]:57057 "EHLO tservice.net.ru" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1751571AbYJXG2W (ORCPT ); Fri, 24 Oct 2008 02:28:22 -0400 Content-Disposition: inline In-Reply-To: <490127D6.8080201@jsigle.com> Sender: netdev-owner@vger.kernel.org List-ID: Hi Joerg. On Fri, Oct 24, 2008 at 03:41:42AM +0200, Joerg M. Sigle (joerg.sigle@jsigle.com) wrote: > Linux box1 > eth0:192.168.1.1 (3com Vortex or so) > | > | Linux Box2 > | eth0:192.168.1.4 (Ne2000 PCMCIA) > | | > SimpleSwitch > | > eth0:192.168.1.40 (Realtek 8169 onboard) > Linux routerbox (Plain vanilla 2.6.27 SMP) > wlan0:192.168.2.40 (Ralink rt2500 PCI) > | > USR8054 dedicated WLAN-Router > | > Internet (or so). Let me clarify the problem. Traffic fom linux clients only goes through above setup if mtu on the USR8054 lan device is 185 bytes, correct? Can you run network traffic with big mtu (normal 1500 bytes) between linux router and clients? Between clients? -- Evgeniy Polyakov