From owner-freebsd-hackers@FreeBSD.ORG Wed Jun 27 06:22:26 2007 Return-Path: X-Original-To: freebsd-hackers@freebsd.org Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id E2BF216A469 for ; Wed, 27 Jun 2007 06:22:26 +0000 (UTC) (envelope-from jmg@hydrogen.funkthat.com) Received: from hydrogen.funkthat.com (gate.funkthat.com [69.17.45.168]) by mx1.freebsd.org (Postfix) with ESMTP id B197A13C447 for ; Wed, 27 Jun 2007 06:22:26 +0000 (UTC) (envelope-from jmg@hydrogen.funkthat.com) Received: from hydrogen.funkthat.com (84rvcwo2lhs7qfhf@localhost.funkthat.com [127.0.0.1]) by hydrogen.funkthat.com (8.13.6/8.13.3) with ESMTP id l5R6COTQ015967; Tue, 26 Jun 2007 23:12:24 -0700 (PDT) (envelope-from jmg@hydrogen.funkthat.com) Received: (from jmg@localhost) by hydrogen.funkthat.com (8.13.6/8.13.3/Submit) id l5R6CNgw015966; Tue, 26 Jun 2007 23:12:23 -0700 (PDT) (envelope-from jmg) Date: Tue, 26 Jun 2007 23:12:23 -0700 From: John-Mark Gurney To: george+freebsd@m5p.com Message-ID: <20070627061223.GE1221@funkthat.com> Mail-Followup-To: george+freebsd@m5p.com, freebsd-hackers@freebsd.org References: <200706270033.l5R0Xkf9084990@mail.reprise.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200706270033.l5R0Xkf9084990@mail.reprise.com> User-Agent: Mutt/1.4.2.1i X-Operating-System: FreeBSD 5.4-RELEASE-p6 i386 X-Files: The truth is out there X-URL: http://resnet.uoregon.edu/~gurney_j/ X-Resume: http://resnet.uoregon.edu/~gurney_j/resume.html Cc: freebsd-hackers@freebsd.org Subject: Re: Gigabit Ethernet w/Jumbo Frames X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: John-Mark Gurney List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 27 Jun 2007 06:22:27 -0000 george+freebsd@m5p.com wrote this message on Tue, Jun 26, 2007 at 17:33 -0700: > I'm having poor luck trying to use NFS over a gigabit ethernet using > jumbo frames. By all indications, my switch (Netgear GS608) forwards > jumbo frames with no difficulty, but my Realtek 8169-based cards seem Are you sure? I just tried w/ my GS608 again, and it still doesn't pass jumbo frames... I specifically bought a second switch, an SMC 8508T so that I could work on jumbo frame support... I took my MBP to the SMC and verified that I could ping 5k packets w/o fragmentation between the two (MBP and a FreeBSD-current box w/ an em card) boxes, and then took my MBP to the Netgear, and the remote box would not see the large pings... I just checked Netgear's website, and they do list Jumbo Frame support.. Either I have an old switch and newer ones support it, or they depend upon that most people can't figure out to make jumbo frames work reliabily and depend upon people just using 1500 byte frames... -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."