From owner-freebsd-current@FreeBSD.ORG Mon Sep 11 05:46:59 2006 Return-Path: X-Original-To: freebsd-current@freebsd.org 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 1D9BD16A403; Mon, 11 Sep 2006 05:46:59 +0000 (UTC) (envelope-from if@hetzner.co.za) Received: from hetzner.co.za (office.cpt2.host-h.net [196.7.147.230]) by mx1.FreeBSD.org (Postfix) with ESMTP id 973B943D49; Mon, 11 Sep 2006 05:46:57 +0000 (GMT) (envelope-from if@hetzner.co.za) Received: from localhost ([127.0.0.1] helo=ian.hetzner.africa) by hetzner.co.za with esmtp (Exim 4.62 (FreeBSD)) (envelope-from ) id 1GMedA-0003eD-Vj; Mon, 11 Sep 2006 07:46:52 +0200 To: Prafulla Deuskar From: Ian FREISLICH In-Reply-To: Message from Prafulla Deuskar of "Sat, 09 Sep 2006 07:00:15 GMT." <20060909070015.GA71855@hub.freebsd.org> X-Attribution: BOFH Date: Mon, 11 Sep 2006 07:46:52 +0200 Message-Id: Cc: Pyun YongHyeon , freebsd-net , freebsd-current , Jack Vogel Subject: Re: RFC: TSO patch for current X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 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: Mon, 11 Sep 2006 05:46:59 -0000 Prafulla Deuskar wrote: > Pyun YongHyeon [pyunyh@gmail.com] wrote: > >What happen if users disable hardware > > VLAN tag insertion with ifconfig(8)? > > TSO requires that VLAN tag insertion is done by hardware This is bad news. I use CARP interfaces in all my VLANs which places the interface in promiscuous mode. I've noted that the em driver stops tagging ethernet frames when hardware tag insertion is enabled and the interface is in promiscuous mode. I don't know enough to determine whether this is a hardware or software bug. Ian -- Ian Freislich