IETF Logo Mail Archive

Re: [v6ops] OSX 10.8 poor performance for IPv6-only!

Hiroaki Hazeyama <hiroa-ha@is.naist.jp> Tue, 29 January 2013 17:23 UTC

Return-Path: <hiroa-ha@is.naist.jp>
X-Original-To: v6ops@ietfa.amsl.com
Delivered-To: v6ops@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A901521F886E for <v6ops@ietfa.amsl.com>; Tue, 29 Jan 2013 09:23:43 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: 0.51
X-Spam-Level:
X-Spam-Status: No, score=0.51 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, HELO_EQ_JP=1.244, HOST_EQ_JP=1.265, J_CHICKENPOX_13=0.6]
Received: from mail.ietf.org ([64.170.98.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id eS3tUiAXfH5t for <v6ops@ietfa.amsl.com>; Tue, 29 Jan 2013 09:23:42 -0800 (PST)
Received: from mailrelay11.naist.jp (mailrelay11.naist.jp [163.221.80.162]) by ietfa.amsl.com (Postfix) with ESMTP id 80BF321F8734 for <v6ops@ietf.org>; Tue, 29 Jan 2013 09:23:41 -0800 (PST)
Received: from mailpost11.naist.jp (mailscan11.naist.jp [163.221.80.161]) by mailrelay11.naist.jp (Postfix) with ESMTP id AE77D6E18 for <v6ops@ietf.org>; Wed, 30 Jan 2013 02:23:38 +0900 (JST)
Received: from [192.168.2.100] (222-151-098-098.jp.fiberbit.net [222.151.98.98]) (Authenticated sender: hiroa-ha) by mailpost11.naist.jp (Postfix) with ESMTPSA id 8E8336E17 for <v6ops@ietf.org>; Wed, 30 Jan 2013 02:23:38 +0900 (JST)
Message-ID: <5108058D.2000408@is.naist.jp>
Date: Wed, 30 Jan 2013 02:23:25 +0900
From: Hiroaki Hazeyama <hiroa-ha@is.naist.jp>
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130107 Thunderbird/17.0.2
MIME-Version: 1.0
To: v6ops@ietf.org
References: <B14A62A57AB87D45BB6DD7D9D2B78F0B114E66F5@xmb-rcd-x06.cisco.com>
In-Reply-To: <B14A62A57AB87D45BB6DD7D9D2B78F0B114E66F5@xmb-rcd-x06.cisco.com>
Content-Type: text/plain; charset="ISO-8859-1"; format="flowed"
Content-Transfer-Encoding: 7bit
X-TM-AS-Product-Ver: IMSS-7.0.0.8105-6.8.0.1017-19598.000
X-TM-AS-Result: No--14.201-5.0-31-1
X-imss-scan-details: No--14.201-5.0-31-1
Subject: Re: [v6ops] OSX 10.8 poor performance for IPv6-only!
X-BeenThere: v6ops@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: v6ops discussion list <v6ops.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/v6ops>, <mailto:v6ops-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/v6ops>
List-Post: <mailto:v6ops@ietf.org>
List-Help: <mailto:v6ops-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/v6ops>, <mailto:v6ops-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 29 Jan 2013 17:23:43 -0000

we reported it in 4.2.2.2 of 
http://tools.ietf.org/html/draft-hazeyama-widecamp-ipv6-only-experience-02

----
hazeyama

(2013/01/30 2:18), Rajiv Asati (rajiva) wrote:
>
> A weird behavior of OSX 10.8.2 wrt DNS A and AAAA lookup (with IPv6 GUA,
> but no IPv4 public/private address) is intermittently causing very poor
> browser internet experience on the MacBook.
>
> MBP nicely issues both DNS A and AAAA queries over IPv6 transport for a
> given website (say, www.cnn.com) almost at the same time (e.g. opens 2 UDP
> sockets), and receives both A and AAAA responses from the DNS server.
> However, it may close both UDP sockets upon receiving the first DNS
> response (whether A or AAAA), thereby ignoring the 2nd DNS response
> (whether A or AAAA).
>
> Suffice to say that MBP issues an ICMPv6 Destination/port unreachable for
> the 2nd DNS response (see the attached 2 screen wireshark screenshots).
>
> This is quite bad, since if an AAAA record was carried in the ignored DNS
> message, then no TCP connection would follow => forget happy eyeballs and
> recall poor internet experience. :(
>
> Has anybody else run into this or noticed it?
>
> Cheers,
> Rajiv
>
>
>
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops
>

v2.23.0 | Report a Bug | By Email