From owner-freebsd-net@FreeBSD.ORG Sun Mar 16 20:29:54 2008 Return-Path: Delivered-To: freebsd-net@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E3FF8106566B for ; Sun, 16 Mar 2008 20:29:54 +0000 (UTC) (envelope-from scf@FreeBSD.org) Received: from mail.farley.org (farley.org [67.64.95.201]) by mx1.freebsd.org (Postfix) with ESMTP id ABCE48FC1A for ; Sun, 16 Mar 2008 20:29:54 +0000 (UTC) (envelope-from scf@FreeBSD.org) Received: from thor.farley.org (thor.farley.org [192.168.1.5]) by mail.farley.org (8.14.2/8.14.2) with ESMTP id m2GKTqRo005419 for ; Sun, 16 Mar 2008 15:29:52 -0500 (CDT) (envelope-from scf@FreeBSD.org) Date: Sun, 16 Mar 2008 15:29:52 -0500 (CDT) From: "Sean C. Farley" To: freebsd-net@FreeBSD.org Message-ID: User-Agent: Alpine 1.00 (BSF 882 2007-12-20) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII X-Spam-Status: No, score=-4.4 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 autolearn=ham version=3.2.4 X-Spam-Checker-Version: SpamAssassin 3.2.4 (2008-01-01) on mail.farley.org Cc: Subject: Frequent pauses with Linux-based router X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 16 Mar 2008 20:29:55 -0000 I have noticed that with a Linux-based Netgear DG834G (DSL modem) frequent pauses (example[1]) between external systems and 7-STABLE (March 14th). At first, I thought it was ipfilter or ipnat, but I took those out of the picture by activating telnet on the router and connecting directly to it. Even running "ls /usr/sbin" on the router would pause occasionally. I did not (or did not recall) have these problems with 6-STABLE (post 6.2). I switched out the NIC (FA-311 (sis) to a FA-310 (dc)), cable and tried different ports on the modem by which to connect. I also tried disabling all RFC sysctl's and SACK. Nothing helped. Finally, I brought out an old DSL modem (SpeedStream 5660). This fixed the issue. I think this maybe a specific issue between Linux (2.4.17_mvl21-malta-mips_fp_le) and FreeBSD 7. Is there anything else I may test to see what is happening? Sean 1. http://www.farley.org/freebsd/tmp/DSL/dsl-dmp.txt (telnet session between gateway and DSL modem) -- scf@FreeBSD.org