From owner-freebsd-net@FreeBSD.ORG Sat Jan 7 07:45:21 2006 Return-Path: X-Original-To: freebsd-net@freebsd.org Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D45E416A447 for ; Sat, 7 Jan 2006 07:45:20 +0000 (GMT) (envelope-from fooler@skyinet.net) Received: from smtp1.skyinet.net (smtp1.skyinet.net [202.78.97.6]) by mx1.FreeBSD.org (Postfix) with ESMTP id B9E1743D46 for ; Sat, 7 Jan 2006 07:45:19 +0000 (GMT) (envelope-from fooler@skyinet.net) Received: from fooler (fooler.ilo.skyinet.net [202.78.118.66]) by smtp1.skyinet.net (Postfix) with SMTP id F1F84582C4; Sat, 7 Jan 2006 15:45:18 +0800 (PHT) Message-ID: <018e01c6135e$4c25b130$42764eca@ilo.skyinet.net> From: "fooler" To: "kamal kc" , "freebsd" References: <20060106071807.87771.qmail@web30008.mail.mud.yahoo.com> Date: Sat, 7 Jan 2006 15:45:14 +0800 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Cc: Subject: Re: increasing the ethernet MTU greater than 1500 (1502) X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 07 Jan 2006 07:45:22 -0000 ----- Original Message ----- From: "kamal kc" To: "freebsd" Sent: Friday, January 06, 2006 3:18 PM Subject: increasing the ethernet MTU greater than 1500 (1502) > i don't want to fragment the packet as i think > that is too much overhead for 2 bytes. rather i > want to increase the mtu. why increase the mtu when you can decrease it? one good example is the PPPoE... default mtu size of pppoe is 1492 because of the 6 bytes pppoe header and 2 bytes ppp protocol id to fit into the default 1500 mtu of ethernet.... therefore you set your mtu to 1498 to fit your 2 bytes extra header :-> in that way you are safe from any violation of rfcs... fooler.