IETF Logo Mail Archive

Re: [dhcwg] DHCPv4 - definition of maximum message size.

Bud Millwood <budm@weird-solutions.com> Sat, 07 May 2005 11:56 UTC

Received: from localhost.localdomain ([127.0.0.1] helo=megatron.ietf.org) by megatron.ietf.org with esmtp (Exim 4.32) id 1DUNvV-0003Iu-Uc; Sat, 07 May 2005 07:56:57 -0400
Received: from odin.ietf.org ([132.151.1.176] helo=ietf.org) by megatron.ietf.org with esmtp (Exim 4.32) id 1DUNvU-0003Ip-NF for dhcwg@megatron.ietf.org; Sat, 07 May 2005 07:56:56 -0400
Received: from ietf-mx.ietf.org (ietf-mx.ietf.org [132.151.6.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id HAA03076 for <dhcwg@ietf.org>; Sat, 7 May 2005 07:56:55 -0400 (EDT)
Received: from intermail.se.dataphone.net ([212.37.1.50]) by ietf-mx.ietf.org with esmtp (Exim 4.33) id 1DUOAA-0003o0-VM for dhcwg@ietf.org; Sat, 07 May 2005 08:12:08 -0400
Received: from [213.115.152.226] (account budm@weird-solutions.com HELO offset.weird.se) by intermail.se.dataphone.net (CommuniGate Pro SMTP 4.2) with ESMTP id 17955467; Sat, 07 May 2005 13:56:53 +0200
From: Bud Millwood <budm@weird-solutions.com>
Organization: Weird Solutions, Inc.
To: dhcwg@ietf.org
Subject: Re: [dhcwg] DHCPv4 - definition of maximum message size.
Date: Sat, 07 May 2005 13:35:26 +0200
User-Agent: KMail/1.6.2
References: <427B506B.1050005@thekelleys.org.uk>
In-Reply-To: <427B506B.1050005@thekelleys.org.uk>
MIME-Version: 1.0
Content-Disposition: inline
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Message-Id: <200505071335.26787.budm@weird-solutions.com>
X-Spam-Score: 0.0 (/)
X-Scan-Signature: 7655788c23eb79e336f5f8ba8bce7906
Content-Transfer-Encoding: 7bit
Cc:
X-BeenThere: dhcwg@ietf.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: Bud Millwood <budm@weird-solutions.com>
List-Id: dhcwg.ietf.org
List-Unsubscribe: <https://www1.ietf.org/mailman/listinfo/dhcwg>, <mailto:dhcwg-request@ietf.org?subject=unsubscribe>
List-Post: <mailto:dhcwg@ietf.org>
List-Help: <mailto:dhcwg-request@ietf.org?subject=help>
List-Subscribe: <https://www1.ietf.org/mailman/listinfo/dhcwg>, <mailto:dhcwg-request@ietf.org?subject=subscribe>
Sender: dhcwg-bounces@ietf.org
Errors-To: dhcwg-bounces@ietf.org

On Friday 06 May 2005 13:09, Simon Kelley wrote:

> Does the value in "maximum message size" option (option code 56) include
> the IP and UDP headers?

This has been brought up before, since it's not obvious from the specs, and 
the general consensus IIRC is "yes".

I think most DHCP servers by now will (correctly) subtract ip+udp header sizes 
from the value the client advertises.

And for David: I seem to recall that the ISC DHCP server uses some type of raw 
interface to the network layer; might the ethernet header size be included 
for that reason?

Regards,

Bud Millwood
Weird Solutions, Inc.
http://www.weird-solutions.com
tel: +46 8 758 3700
fax: +46 8 758 3687
mailto:budm@weird-solutions.com

_______________________________________________
dhcwg mailing list
dhcwg@ietf.org
https://www1.ietf.org/mailman/listinfo/dhcwg

v2.23.0 | Report a Bug | By Email