[ssm] IPv6 Multicast Throughput problems in 802.11

"Tiago Sousa" <tmas@dei.uc.pt> Tue, 15 November 2005 02:26 UTC

Received: from localhost.cnri.reston.va.us ([127.0.0.1] helo=megatron.ietf.org) by megatron.ietf.org with esmtp (Exim 4.32) id 1EbqWv-0000lo-2s; Mon, 14 Nov 2005 21:26:41 -0500
Received: from odin.ietf.org ([132.151.1.176] helo=ietf.org) by megatron.ietf.org with esmtp (Exim 4.32) id 1EbqWt-0000lg-Cg for ssm@megatron.ietf.org; Mon, 14 Nov 2005 21:26:39 -0500
Received: from ietf-mx.ietf.org (ietf-mx [132.151.6.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id VAA21700 for <ssm@ietf.org>; Mon, 14 Nov 2005 21:26:07 -0500 (EST)
Received: from smtp2.dei.uc.pt ([193.137.203.231] helo=smtp.dei.uc.pt) by ietf-mx.ietf.org with esmtp (Exim 4.43) id 1Ebqo0-00018D-BG for ssm@ietf.org; Mon, 14 Nov 2005 21:44:22 -0500
Received: from laptop ([85.138.126.61]) (authenticated bits=0) by smtp.dei.uc.pt (8.13.4/8.13.4) with ESMTP id jAF2Rkbu025768 (version=TLSv1/SSLv3 cipher=RC4-MD5 bits=128 verify=NO) for <ssm@ietf.org>; Tue, 15 Nov 2005 02:27:47 GMT
Message-Id: <200511150227.jAF2Rkbu025768@smtp.dei.uc.pt>
From: "Tiago Sousa" <tmas@dei.uc.pt>
To: <ssm@ietf.org>
Date: Tue, 15 Nov 2005 02:26:04 -0000
MIME-Version: 1.0
X-Mailer: Microsoft Office Outlook, Build 11.0.6353
Thread-Index: AcXpi+0msejobDocSsmFvUIOiv2E2w==
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527
X-FCTUC-DEI-SIC-MailScanner-Information: Please contact helpdesk@dei.uc.pt for more information
X-FCTUC-DEI-SIC-MailScanner: Found to be clean
X-FCTUC-DEI-SIC-MailScanner-SpamCheck: not spam (whitelisted), SpamAssassin (score=-4.398, required 3, autolearn=not spam, ALL_TRUSTED -1.80, BAYES_00 -2.60, HTML_MESSAGE 0.00)
X-FCTUC-DEI-SIC-MailScanner-From: tmas@dei.uc.pt
X-Spam-Score: 0.2 (/)
X-Scan-Signature: d890c9ddd0b0a61e8c597ad30c1c2176
Subject: [ssm] IPv6 Multicast Throughput problems in 802.11
X-BeenThere: ssm@ietf.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Source-Specific Multicast <ssm.ietf.org>
List-Unsubscribe: <https://www1.ietf.org/mailman/listinfo/ssm>, <mailto:ssm-request@ietf.org?subject=unsubscribe>
List-Post: <mailto:ssm@ietf.org>
List-Help: <mailto:ssm-request@ietf.org?subject=help>
List-Subscribe: <https://www1.ietf.org/mailman/listinfo/ssm>, <mailto:ssm-request@ietf.org?subject=subscribe>
Content-Type: multipart/mixed; boundary="===============1840438086=="
Sender: ssm-bounces@ietf.org
Errors-To: ssm-bounces@ietf.org

Hello to all

 

I am testing the PIM-SSM daemon (both freebsd and linux) and mrd6 (another
IPv6 multicast routing daemon) in a wireless link. 

The problem I encountered with both pim6sd daemon and mrd6 is that I'm
sending multicast traffic at 4 Mbps and the throughput in the mobile node
(which is very near from de access point) rounds 40 kbps.

I am using the mad-flute tool to send the multicast SSM traffic and the
tcpdump plus trpr to analyze the data. I have also used IxChariot and the
results are the same.

 

Anyone knows why the throughput decreases so much in the wireless link?
(The multicast TTL is well defined, I have experimented with several
pci/pcmcia cards and drivers and several access points configurations
(different channels and rates (801.11b and 802.11g)). The results are remain
always the same).

 

I would appreciate any help/hint that helps me to explain these results.

 

Thanks.

 

Tiago Sousa

 

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