From owner-freebsd-current@FreeBSD.ORG Sat May 15 16:27:35 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0227216A4CE for ; Sat, 15 May 2004 16:27:35 -0700 (PDT) Received: from ioda-txdap01.iodamedia.net (mail.iodamedia.net [64.5.44.222]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8588E43D45 for ; Sat, 15 May 2004 16:27:34 -0700 (PDT) (envelope-from shawnm@iodamedia.net) Received: from localhost (localhost [127.0.0.1]) by ioda-txdap01.iodamedia.net (Postfix) with ESMTP id BB2D334CDD for ; Sat, 15 May 2004 17:14:21 -0500 (CDT) Received: from zeus (CPE-24-166-186-253.kc.rr.com [24.166.186.253]) by ioda-txdap01.iodamedia.net (Postfix) with SMTP id 2FAB82EB06 for ; Sat, 15 May 2004 17:14:20 -0500 (CDT) From: "Shawn Mitchell" To: "FreeBSD current users" Date: Sat, 15 May 2004 17:22:02 -0500 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 Importance: Normal X-Virus-Scanned: by AMaViS 0.3.12 Subject: 5.2.1 em driver and vlan issue. X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 15 May 2004 23:27:35 -0000 I'm trying to get some stuff tested out, but I'm having a huge issue. em0 (no ip addy) (Intel PRO/1000) vlan0 -> em0 (10.0.0.1/24) vlan1 -> em0 (10.0.1.1/24) ..... vlan9 -> em0 (10.0.9.1/24) Everything has a MTU of 1500 (set by default) Now, the problem I'm having is the classic, it's 'dropping' the large packets. Sometimes if the packet is greater than 650 bytes, sometimes 750 bytes. I've tried setting em0's mtu to 9000 (jumbo packets, and yes, the switch supports them), I've tried setting the mtu lower for vlan0, but nothing seems to fix this issue. Any idea's on how I can test this further, or fix it? The throughput should be sitting at port speed for my test boxes sitting on two different vlan's, but I'm seeing speeds of around 200kbit/sec on a 100meg/sec port. testing between two boxes on the same vlan (so they don't route traffic to the FreeBSD box) shows just a few kbit/sec short of 100mbit/sec. This is starting to drive me nuts. -Shawn