From owner-freebsd-stable@FreeBSD.ORG Tue Jul 24 18:22:54 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id D71421065679 for ; Tue, 24 Jul 2012 18:22:54 +0000 (UTC) (envelope-from mandrews@bit0.com) Received: from magnum.bit0.com (magnum.bit0.com [IPv6:2604:e700:b0:1::200]) by mx1.freebsd.org (Postfix) with ESMTP id 8BDF48FC14 for ; Tue, 24 Jul 2012 18:22:54 +0000 (UTC) Received: from magnum.bit0.com (localhost [127.0.0.1]) by magnum.bit0.com (Postfix) with ESMTP id A9B0812529 for ; Tue, 24 Jul 2012 14:22:53 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed; d=bit0.com; h=message-id :date:from:mime-version:to:subject:references:in-reply-to :content-type:content-transfer-encoding; s=boogity; bh=+Eui+E/LF ZWjKlARCwNZWq9hnS8ZT/W/7fKp9b0ZeZo=; b=F9O6sNzVkwDu7KjxfMqb0KhKP PAui8L70afHl3guWkxFhdB81TeJTSmf/rcYxJ7iPx2IIrdYykAC7waYQZYxtKtoH cHsF9/meeUt1DvJ1JJtcIdwoTPqjBuydAnxUzUozd0wudSPCuchcSmVmh24qrx9F mIrkm9ItuRaByECVFM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=bit0.com; h=message-id:date :from:mime-version:to:subject:references:in-reply-to :content-type:content-transfer-encoding; q=dns; s=boogity; b=X7D Cs/E1b3fVCaDCuTwfj++w/advbkurgKfLnI7JVt+BYzVMpkVj3X12y1wf0cdVOxs ayR0M2ZTs7xtgXgQubAvQ8s8AjdETcpGTyXg+oQqcGaOC4sTLQc3Ki5FO0/GlA8g HFU8XqWWu2ITtH2H5ZsmbudlDl1G/70KQwggmgKA= Received: from spike.int.bit0.com (207-246-87-56.dsl.static.blueone.net [207.246.87.56]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by magnum.bit0.com (Postfix) with ESMTPSA id 8F1D112528 for ; Tue, 24 Jul 2012 14:22:53 -0400 (EDT) Message-ID: <500EE7FC.8050702@bit0.com> Date: Tue, 24 Jul 2012 14:22:52 -0400 From: Mike Andrews User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:14.0) Gecko/20120713 Thunderbird/14.0 MIME-Version: 1.0 To: freebsd-stable@freebsd.org References: <500D90C5.2020208@rpi.edu> <5988D182-E3AA-4F38-BD33-15728D52230F@inoc.net> In-Reply-To: <5988D182-E3AA-4F38-BD33-15728D52230F@inoc.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: pxeboot with jumbo frame network X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Jul 2012 18:22:55 -0000 On 7/24/12 6:07 AM, Robert Blayzor wrote: > On Jul 23, 2012, at 1:58 PM, Bob Healey wrote: >> I know I have this working, however I don't remember what I did. I know I can pxeboot and install RHEL on a 9K frame network from a FreeBSD tftp server/NAT gateway. I do know the first thing in my RHEL install script is to set the MTU to 9K. >> If I have a chance later today, I'll dig into one of my install servers and try to figure out what options I used with DHCP to get it working. > > The trick is setting the boot time options on the client. The server side (TFTP server) is the easy part as it's already setup and running. But if the client boots and it's not jumbo frame enabled, TFTP will surely hang on getting the PXEboot as the server will be trying to send 9K UDP frames to a client that's probably defaulted to 1500. > > If there is a DHCP option to set the client MTU, I've not found it anywhere. > If it's isc-dhcpd, "option interface-mtu" works.