From owner-freebsd-stable@FreeBSD.ORG Tue Jul 24 10:24:03 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 61511106566C for ; Tue, 24 Jul 2012 10:24:03 +0000 (UTC) (envelope-from rblayzor.bulk@inoc.net) Received: from mail0.albyny.inoc.net (mail0.albyny.inoc.net [64.22.32.70]) by mx1.freebsd.org (Postfix) with ESMTP id 0B8138FC0C for ; Tue, 24 Jul 2012 10:24:02 +0000 (UTC) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=inoc.net; h=Received:Subject:From:Date:To; b=XbfkdHyS1L6pWLYeLbZhDeceEQejRP5JsxIXQSqtLhS/Cdl08CTV+JgLdaula+93zTwwseRkGxTs9WLg52Qm0dokSbJ4gu8WZKF02MRM6tpyG+7Tvjv/IIv/mZLvrYKt2Sf1ZxIhVL63HHQStH/MuAPdmVZ2b+pQcpLz2k+ho2M=; X-Default-Received-SPF: pass (skip=loggedin (res=PASS)); Received: from [172.16.0.10] (cpe-74-70-94-26.nycap.res.rr.com [74.70.94.26]) by mail0.albyny.inoc.net (build v12.6.10) with ESMTP id 7484489-1941382 for ; Tue, 24 Jul 2012 10:07:36 +0000 Content-Type: text/plain; charset=iso-8859-1 Mime-Version: 1.0 (Apple Message framework v1280) From: Robert Blayzor In-Reply-To: <500D90C5.2020208@rpi.edu> Date: Tue, 24 Jul 2012 06:07:36 -0400 Content-Transfer-Encoding: quoted-printable Message-Id: <5988D182-E3AA-4F38-BD33-15728D52230F@inoc.net> References: <500D90C5.2020208@rpi.edu> To: freebsd-stable@freebsd.org X-Mailer: Apple Mail (2.1280) X-Authenticated-User: rblayzor@inoc.net 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 10:24:03 -0000 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. --=20 Robert Blayzor INOC, LLC rblayzor@inoc.net http://www.inoc.net/~rblayzor/