From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sridhar Samudrala Subject: why is IP_MAX_MTU limited to 65520 bytes Date: Tue, 25 Aug 2009 16:25:40 -0700 Message-ID: <1251242740.3169.69.camel@w-sridhar.beaverton.ibm.com> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit To: netdev Return-path: Received: from e39.co.us.ibm.com ([32.97.110.160]:33001 "EHLO e39.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932255AbZHYXZl (ORCPT ); Tue, 25 Aug 2009 19:25:41 -0400 Received: from d03relay04.boulder.ibm.com (d03relay04.boulder.ibm.com [9.17.195.106]) by e39.co.us.ibm.com (8.14.3/8.13.1) with ESMTP id n7PNKbiG001414 for ; Tue, 25 Aug 2009 17:20:37 -0600 Received: from d03av01.boulder.ibm.com (d03av01.boulder.ibm.com [9.17.195.167]) by d03relay04.boulder.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id n7PNPgdw217036 for ; Tue, 25 Aug 2009 17:25:42 -0600 Received: from d03av01.boulder.ibm.com (loopback [127.0.0.1]) by d03av01.boulder.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id n7PNPgSj030547 for ; Tue, 25 Aug 2009 17:25:42 -0600 Received: from [9.47.18.19] (w-sridhar.beaverton.ibm.com [9.47.18.19]) by d03av01.boulder.ibm.com (8.12.11.20060308/8.12.11) with ESMTP id n7PNPfK2030517 for ; Tue, 25 Aug 2009 17:25:42 -0600 Sender: netdev-owner@vger.kernel.org List-ID: Any reason why the maximum IP payload is limited to IP_MAX_MTU(0xFFF0) bytes instead of the maximum possible value of 0xFFFF Thanks Sridhar