<html>
<head>
<style>
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
FONT-SIZE: 10pt;
FONT-FAMILY:Tahoma
}
</style>
</head>
<body class='hmmessage'>
Hi,<br>I am running a Juniper M10 as Multicast router in my network. It automatically becomes the DR of the "VLAN" as the Linux server is situated on. I also have other Linux servers on that switch in the same VLAN and IGMP-snooping is working for them. <br><br>They are running RedHat and not Suse though. They are not listed as "Router" by the Summit450X.<br><br>When doing a tcpdump on my Linux server I do not see any traffic going to 224.0.0.2 (all routers) so I don't understand why the switch lists that Linux as a router. Really strange...<br><br>BR<br>/// Fredrik<br><br> <br><br><hr>From: MLouis@nwnit.com<br>To: fabian.extr@gmail.com; extreme-nsp@puck.nether.net<br>Date: Tue, 16 Sep 2008 08:10:44 -0400<br>Subject: Re: [e-nsp] Summit450X - strange IGMP-snooping on port connected to Linux server?<br><br>
<meta http-equiv="Content-Type" content="text/html; charset=unicode">
<meta name="Generator" content="Microsoft SafeHTML">
<style>
@page Section1
{;}
.ExternalClass P.EC_MsoNormal
{font-size:12pt;font-family:'Times New Roman','serif';}
.ExternalClass LI.EC_MsoNormal
{font-size:12pt;font-family:'Times New Roman','serif';}
.ExternalClass DIV.EC_MsoNormal
{font-size:12pt;font-family:'Times New Roman','serif';}
.ExternalClass A:link
{color:blue;text-decoration:underline;}
.ExternalClass SPAN.EC_MsoHyperlink
{color:blue;text-decoration:underline;}
.ExternalClass A:visited
{color:purple;text-decoration:underline;}
.ExternalClass SPAN.EC_MsoHyperlinkFollowed
{color:purple;text-decoration:underline;}
.ExternalClass P
{font-size:12pt;margin-left:0cm;margin-right:0cm;font-family:'Times New Roman','serif';}
.ExternalClass SPAN.EC_EmailStyle18
{color:#1f497d;font-family:'Calibri','sans-serif';}
.ExternalClass .EC_MsoChpDefault
{font-size:10pt;}
.ExternalClass DIV.EC_Section1
{;}
</style>
<style title="owaParaStyle">
.ExternalClass P
{margin-bottom:0px;}
</style>
<div dir="ltr"><font size="2" color="#000000" face="Tahoma">In my experience, IGMP snooping will not work unless the layer 2 switch snoops the client report. Meaning you have to have clients who want to join a group sending IGMP join reports that the switch
can snoop. This usually requires that something be performing the quierier process, ie a multicast enabled router. 224.0.0.2 is all routers MC address. Enable PIM on the router and see if IGMP snooping works.</font></div>
<div id="EC_divRpF499118" style="direction: ltr;">
<hr>
<font size="2" face="Tahoma"><b>From:</b> extreme-nsp-bounces@puck.nether.net [extreme-nsp-bounces@puck.nether.net] On Behalf Of Fabian [fabian.extr@gmail.com]<br>
<b>Sent:</b> Tuesday, September 16, 2008 7:28 AM<br>
<b>To:</b> extreme-nsp@puck.nether.net<br>
<b>Subject:</b> Re: [e-nsp] Summit450X - strange IGMP-snooping on port connected to Linux server?<br>
</font><br>
</div>
<div></div>
<div>
<div class="EC_Section1">
<p class="EC_MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125); font-family: 'Calibri','sans-serif';">Hi Frederik,</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125); font-family: 'Calibri','sans-serif';"></span> </p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125); font-family: 'Calibri','sans-serif';">If your server is considered as a Router, that means that it is advertising on multicast address :
</span>224.0.0.2<span style="font-size: 11pt; color: rgb(31, 73, 125); font-family: 'Calibri','sans-serif';"></span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125); font-family: 'Calibri','sans-serif';"></span> </p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125); font-family: 'Calibri','sans-serif';">So do a TCPDUMP to check if so and verify if you don’t have a router feature enabled.</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125); font-family: 'Calibri','sans-serif';"></span> </p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125); font-family: 'Calibri','sans-serif';">Regards, Fabian.</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125); font-family: 'Calibri','sans-serif';"></span> </p>
<div>
<div style="border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; border-width: 1pt medium medium; padding: 3pt 0cm 0cm;">
<p class="EC_MsoNormal"><b><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">From:</span></b><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"> extreme-nsp-bounces@puck.nether.net [mailto:extreme-nsp-bounces@puck.nether.net]
<b>On Behalf Of </b>F J<br>
<b>Sent:</b> mardi 16 septembre 2008 12:26<br>
<b>To:</b> extreme-nsp@puck.nether.net<br>
<b>Subject:</b> Re: [e-nsp] Summit450X - strange IGMP-snooping on port connected to Linux server?</span></p>
</div>
</div>
<p class="EC_MsoNormal"> </p>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">Hi,<br>
Thanks for your answer. But isn't the BCR and CBSR config only important if <br>
you are running the Switch in layer3?<br>
<br>
I am only using it as a layer2 switch.<br>
<br>
I still think that it is strange that the switch is considering this server as being<br>
a "router" when running the show commands. There must be some critera for<br>
the switch to do that or? <br>
<br>
More info about this Linux server:<br>
My Linux server is running JBoss and I see some IGMP-join packages to going to<br>
224.0.0.75 and 228.30.4.76 when starting up.<br>
<br>
Best Regards<br>
/// Fredrik<br>
<br>
<br>
<br>
</span></p>
<div class="EC_MsoNormal" style="text-align: center;" align="center"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">
<hr size="2" width="100%" align="center">
</span></div>
<p class="EC_MsoNormal" style="margin-bottom: 12pt;"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"><br>
Date: Tue, 16 Sep 2008 11:52:02 +0300<br>
From: napstertash@gmail.com<br>
To: ripprapp@hotmail.com<br>
Subject: Re: [e-nsp] Summit450X - strange IGMP-snooping on port connected to Linux server?<br>
CC: extreme-nsp@puck.nether.net<br>
<br>
</span></p>
<div>
<p class="EC_MsoNormal" style="margin-bottom: 12pt;"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">Hello FJ,</span></p>
<div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">On Tue, Sep 16, 2008 at 8:21 AM, F J <<a href="mailto:ripprapp@hotmail.com">ripprapp@hotmail.com</a>> wrote:</span></p>
<div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"><br>
Hi,<br>
I am using a Summit450X as a layer2 switch in my multicast network. <br>
I am using PIM SM on my routers and I am running IGMP snooping on my layer2 switches.<br>
<br>
On this 450X-switch I have a HP server runnning Linux connected to port 21.<br>
<br>
When running some show commands (see below) it looks like the switch thinks that the
<br>
server is a router? And that it should get all Multicast streams? </span></p>
</div>
<div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"></span> </p>
</div>
<div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">You might have to play a lot more with the priorities so you figure this out, I would think. </span></p>
</div>
<div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"></span> </p>
</div>
<blockquote style="border-style: none none none solid; border-color: -moz-use-text-color -moz-use-text-color -moz-use-text-color rgb(204, 204, 204); border-width: medium medium medium 1pt; padding: 0cm 0cm 0cm 6pt; margin-bottom: 5pt;">
<div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"><br>
<br>
Can anyone explain what is causing this? </span></p>
</div>
</blockquote>
<div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"></span> </p>
</div>
<div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">I think the answer might be between the configuration settings you have got for both the BSR and CBSR.</span></p>
</div>
<div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"></span> </p>
</div>
<blockquote style="border-style: none none none solid; border-color: -moz-use-text-color -moz-use-text-color -moz-use-text-color rgb(204, 204, 204); border-width: medium medium medium 1pt; padding: 0cm 0cm 0cm 6pt; margin-bottom: 5pt;">
<div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"><br>
Is my switch misconfigured or is my server doing something strange?<br>
What is the criteria for being listed as a router by the switch?<br>
<br>
Port 45 is connected to the closest router.<br>
<br>
Any ideas of what could be causing this kind of behaviour is appreciated!</span></p>
</div>
</blockquote>
<div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"></span> </p>
</div>
<div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">If you don't want this box to participate the the multicast traffic then I would suggest you remove that port form the selected list, OR make the specified port that you
want to be the BSR by using the priorities.</span></p>
</div>
<div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"></span> </p>
</div>
<div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">Hope it helps.</span></p>
</div>
<div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"></span> </p>
</div>
<div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">Regards</span></p>
</div>
<div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"></span> </p>
</div>
<blockquote style="border-style: none none none solid; border-color: -moz-use-text-color -moz-use-text-color -moz-use-text-color rgb(204, 204, 204); border-width: medium medium medium 1pt; padding: 0cm 0cm 0cm 6pt; margin-bottom: 5pt;">
<div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"><br>
<br>
Best Regards<br>
Fredrik<br>
<br>
X450a-48tdc.19 # sh igmp snooping <br>
Vlan Vid Port #Senders #Receivers <b>Router </b>Enable<br>
-------------------------------------------------------------- <br>
SN102 164 6 Yes <br>
19 2 No<br>
20 5 No<br>
<b>21 3 Yes</b><br>
45 0 Yes<br>
<br>
VLAN SN102 (164) Snooping=Enabled <br>
Group Sender Age <br>
<a href="http://239.1.1.1/" target="_blank">239.1.1.1</a> <a href="http://10.21.65.5/" target="_blank">
10.21.65.5</a> 14 <br>
<a href="http://239.1.1.2/" target="_blank">239.1.1.2</a> <a href="http://10.21.65.5/" target="_blank">
10.21.65.5</a> 10 <br>
<a href="http://228.0.198.75/" target="_blank">228.0.198.75</a> <a href="http://10.21.64.4/" target="_blank">
10.21.64.4</a> 25 <br>
<a href="http://228.0.198.76/" target="_blank">228.0.198.76</a> <a href="http://10.21.64.4/" target="_blank">
10.21.64.4</a> 13 <br>
<a href="http://228.0.198.77/" target="_blank">228.0.198.77</a> <a href="http://10.21.64.4/" target="_blank">
10.21.64.4</a> 13 <br>
5 Incoming multicast streams <br>
<br>
Port Host Subscribed Age <br>
19 <a href="http://10.21.64.2/" target="_blank">10.21.64.2</a> <a href="http://225.10.10.10/" target="_blank">
225.10.10.10</a> 66 <br>
19 <a href="http://10.21.64.2/" target="_blank">10.21.64.2</a> <a href="http://226.10.10.10/" target="_blank">
226.10.10.10</a> 63 <br>
20 <a href="http://10.21.64.3/" target="_blank">10.21.64.3</a> <a href="http://224.2.127.254/" target="_blank">
224.2.127.254</a> 67 <br>
20 <a href="http://10.21.64.3/" target="_blank">10.21.64.3</a> <a href="http://224.2.127.255/" target="_blank">
224.2.127.255</a> 69 <br>
20 <a href="http://10.21.64.3/" target="_blank">10.21.64.3</a> <a href="http://234.5.6.7/" target="_blank">
234.5.6.7</a> 63 <br>
20 <a href="http://10.21.64.3/" target="_blank">10.21.64.3</a> <a href="http://239.1.1.1/" target="_blank">
239.1.1.1</a> 64 <br>
20 <a href="http://10.21.64.3/" target="_blank">10.21.64.3</a> <a href="http://239.1.1.2/" target="_blank">
239.1.1.2</a> 61 <br>
21 <a href="http://10.21.64.4/" target="_blank">10.21.64.4</a> <a href="http://228.0.198.75/" target="_blank">
228.0.198.75</a> 68 <br>
21 <a href="http://10.21.64.4/" target="_blank">10.21.64.4</a> <a href="http://228.0.198.76/" target="_blank">
228.0.198.76</a> 63 <br>
21 <a href="http://10.21.64.4/" target="_blank">10.21.64.4</a> <a href="http://228.0.198.77/" target="_blank">
228.0.198.77</a> 60 <br>
<b> 21 <a href="http://10.21.64.4/" target="_blank">10.21.64.4</a> All Groups 69
</b><br>
45 <a href="http://10.21.64.1/" target="_blank">10.21.64.1</a> All Groups 1
</span></p>
<div>
<p class="EC_MsoNormal" style="margin-bottom: 12pt;"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"></span> </p>
</div>
<div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"></span> </p>
<div class="EC_MsoNormal" style="text-align: center;" align="center"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">
<hr size="2" width="100%" align="center">
</span></div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">Connect to the next generation of MSN Messenger
<a href="http://imagine-msn.com/messenger/launch80/default.aspx?locale=en-us&source=wlmailtagline" target="_blank">
Get it now! </a></span></p>
<div class="EC_MsoNormal" style="text-align: center;" align="center"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">
<hr size="2" width="100%" align="center">
</span></div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">Explore the seven wonders of the world
<a href="http://search.msn.com/results.aspx?q=7+wonders+world&mkt=en-US&form=QBRE" target="_blank">
Learn more!</a></span></p>
</div>
</div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"><br>
_______________________________________________<br>
extreme-nsp mailing list<br>
<a href="mailto:extreme-nsp@puck.nether.net">extreme-nsp@puck.nether.net</a><br>
<a href="https://puck.nether.net/mailman/listinfo/extreme-nsp" target="_blank">https://puck.nether.net/mailman/listinfo/extreme-nsp</a></span></p>
</blockquote>
</div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"><br>
<br clear="all">
<br>
-- <br>
Ronnie Tash<br>
---------<br>
A: Because we read from top to bottom, left to right.<br>
Q: Why should i start my reply below the quoted text?<br>
- -- <a href="http://www.i-hate-computers.demon.co.uk/" target="_blank">http://www.i-hate-computers.demon.co.uk/</a><br>
----------------------------------------------</span></p>
</div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"></span> </p>
<div class="EC_MsoNormal" style="text-align: center;" align="center"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">
<hr size="2" width="100%" align="center">
</span></div>
<p class="EC_MsoNormal"><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">Connect to the next generation of MSN Messenger
<a href="http://imagine-msn.com/messenger/launch80/default.aspx?locale=en-us&source=wlmailtagline" target="_blank">
Get it now! </a></span></p>
</div>
</div>
<br>
<hr>
<font size="1" color="Black" face="Arial">Note: This message and any attachments is intended solely for the use of the individual or entity to which it is addressed and may contain information that is non-public, proprietary, legally privileged, confidential,
and/or exempt from disclosure. If you are not the intended recipient, you are hereby notified that any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify
the original sender immediately by telephone or return email and destroy or delete this message along with any attachments immediately.<br>
</font>
<br /><hr />Invite your mail contacts to join your friends list with Windows Live Spaces. It's easy! <a href='http://spaces.live.com/spacesapi.aspx?wx_action=create&wx_url=/friends.aspx&mkt=en-us' target='_new'>Try it!</a></body>
</html>