Re: [tcpm] Re: WGLC: comments on 2581bis

John Heffner <jheffner@psc.edu> Tue, 04 December 2007 21:59 UTC

Return-path: <tcpm-bounces@ietf.org>
Received: from [127.0.0.1] (helo=stiedprmman1.va.neustar.com) by megatron.ietf.org with esmtp (Exim 4.43) id 1IzfnQ-0002b5-PA; Tue, 04 Dec 2007 16:59:16 -0500
Received: from tcpm by megatron.ietf.org with local (Exim 4.43) id 1IzfnO-0002aR-P9 for tcpm-confirm+ok@megatron.ietf.org; Tue, 04 Dec 2007 16:59:14 -0500
Received: from [10.90.34.44] (helo=chiedprmail1.ietf.org) by megatron.ietf.org with esmtp (Exim 4.43) id 1IzfnO-0002aD-F0 for tcpm@ietf.org; Tue, 04 Dec 2007 16:59:14 -0500
Received: from mailer1.psc.edu ([128.182.58.100]) by chiedprmail1.ietf.org with esmtp (Exim 4.43) id 1IzfnO-0002Rl-4o for tcpm@ietf.org; Tue, 04 Dec 2007 16:59:14 -0500
Received: from [128.182.160.132] (ice.psc.edu [128.182.160.132]) (authenticated bits=0) by mailer1.psc.edu (8.14.1/8.13.3) with ESMTP id lB4Lx99k002506 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 4 Dec 2007 16:59:09 -0500 (EST)
Message-ID: <4755CDA8.1010207@psc.edu>
Date: Tue, 04 Dec 2007 16:59:04 -0500
From: John Heffner <jheffner@psc.edu>
User-Agent: Thunderbird 2.0.0.9 (Macintosh/20071031)
MIME-Version: 1.0
To: mallman@icir.org
Subject: Re: [tcpm] Re: WGLC: comments on 2581bis
References: <20071204192941.5FDB4307D60@lawyers.icir.org>
In-Reply-To: <20071204192941.5FDB4307D60@lawyers.icir.org>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-Spam-Score: 0.0 (/)
X-Scan-Signature: 08170828343bcf1325e4a0fb4584481c
Cc: gorry@erg.abdn.ac.uk, tcpm@ietf.org
X-BeenThere: tcpm@ietf.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: TCP Maintenance and Minor Extensions Working Group <tcpm.ietf.org>
List-Unsubscribe: <https://www1.ietf.org/mailman/listinfo/tcpm>, <mailto:tcpm-request@ietf.org?subject=unsubscribe>
List-Post: <mailto:tcpm@ietf.org>
List-Help: <mailto:tcpm-request@ietf.org?subject=help>
List-Subscribe: <https://www1.ietf.org/mailman/listinfo/tcpm>, <mailto:tcpm-request@ietf.org?subject=subscribe>
Errors-To: tcpm-bounces@ietf.org

Mark Allman wrote:
> Gorry-
>> - Is the default RMSS still 536 bytes also for IPv6, since [RFC1122]
>> does not apply in this context to IPv6.
> 
> I think so.  Are you suggesting here that we specify a different value
> when we're going over IPv6?  I am not sure if that is a 2581bis thing or
> a 1122bis thing.

In principle, the TCP's MSS may be independent of MTU, even though in 
most reasonable implementations it's going to be at least as large 
(minus headers).  I think 536 applies to IPv6 as well.  Linux uses this 
value hard-coded for both IPv4 and IPv6.

   -John


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