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Hi,<BR>
My Linux server is running JBoss and I see some IGMP-join packages to going to 224.0.0.75 and 228.30.4.76 when starting up. <BR>
<BR>
It might be those packets that causes the problem. But I do not understand how they can make the 450X think that the server is a router or making the IGMP-snooping funcionality stop working...<BR>
<BR>
Best Regards<BR>
/// Fredrik<BR>
<BR>
<BR><BR>> Date: Wed, 17 Sep 2008 15:10:10 +0530<BR>> From: shankarp5@gmail.com<BR>> To: extreme-nsp@puck.nether.net<BR>> Subject: Re: [e-nsp] Summit450X - strange IGMP-snooping on port connected to Linux server?<BR>> <BR>> Hey<BR>> <BR>> Check if the server is sending out any control protocol or routing<BR>> protocols or any other packet that you expect only a router to send. I<BR>> really dont know the list, but as you suggested there are few protocol<BR>> packets, observing which the L2 box assumes that there is a router on<BR>> the other end....<BR>> <BR>> regards,<BR>> shankar<BR>> <BR>> <BR>> On Tue, Sep 16, 2008 at 6:24 PM, F J <ripprapp@hotmail.com> wrote:<BR>> > Hi,<BR>> > I am running a Juniper M10 as Multicast router in my network. It<BR>> > automatically becomes the DR of the "VLAN" as the Linux server is situated<BR>> > on. I also have other Linux servers on that switch in the same VLAN and<BR>> > IGMP-snooping is working for them.<BR>> ><BR>> > They are running RedHat and not Suse though. They are not listed as "Router"<BR>> > by the Summit450X.<BR>> ><BR>> > When doing a tcpdump on my Linux server I do not see any traffic going to<BR>> > 224.0.0.2 (all routers) so I don't understand why the switch lists that<BR>> > Linux as a router. Really strange...<BR>> ><BR>> > BR<BR>> > /// Fredrik<BR>> ><BR>> ><BR>> ><BR>> > ________________________________<BR>> > 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<BR>> > Linux server?<BR>> ><BR>> > In my experience, IGMP snooping will not work unless the layer 2 switch<BR>> > snoops the client report. Meaning you have to have clients who want to join<BR>> > a group sending IGMP join reports that the switch can snoop. This usually<BR>> > requires that something be performing the quierier process, ie a multicast<BR>> > enabled router. 224.0.0.2 is all routers MC address. Enable PIM on the<BR>> > router and see if IGMP snooping works.<BR>> > ________________________________<BR>> > From: extreme-nsp-bounces@puck.nether.net<BR>> > [extreme-nsp-bounces@puck.nether.net] On Behalf Of Fabian<BR>> > [fabian.extr@gmail.com]<BR>> > Sent: Tuesday, September 16, 2008 7:28 AM<BR>> > To: extreme-nsp@puck.nether.net<BR>> > Subject: Re: [e-nsp] Summit450X - strange IGMP-snooping on port connected to<BR>> > Linux server?<BR>> ><BR>> > Hi Frederik,<BR>> ><BR>> ><BR>> ><BR>> > If your server is considered as a Router, that means that it is advertising<BR>> > on multicast address : 224.0.0.2<BR>> ><BR>> ><BR>> ><BR>> > So do a TCPDUMP to check if so and verify if you don't have a router feature<BR>> > enabled.<BR>> ><BR>> ><BR>> ><BR>> > Regards, Fabian.<BR>> ><BR>> ><BR>> ><BR>> > From: extreme-nsp-bounces@puck.nether.net<BR>> > [mailto:extreme-nsp-bounces@puck.nether.net] On Behalf Of F J<BR>> > Sent: mardi 16 septembre 2008 12:26<BR>> > To: extreme-nsp@puck.nether.net<BR>> > Subject: Re: [e-nsp] Summit450X - strange IGMP-snooping on port connected to<BR>> > Linux server?<BR>> ><BR>> ><BR>> ><BR>> > 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<BR>> > 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<BR>> > to<BR>> > 224.0.0.75 and 228.30.4.76 when starting up.<BR>> ><BR>> > Best Regards<BR>> > /// Fredrik<BR>> ><BR>> ><BR>> ><BR>> ><BR>> ><BR>> > ________________________________<BR>> ><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<BR>> > Linux server?<BR>> > CC: extreme-nsp@puck.nether.net<BR>> ><BR>> > Hello FJ,<BR>> ><BR>> > On Tue, Sep 16, 2008 at 8:21 AM, F J <ripprapp@hotmail.com> wrote:<BR>> ><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<BR>> > 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<BR>> > that the<BR>> > server is a router? And that it should get all Multicast streams?<BR>> ><BR>> ><BR>> ><BR>> > You might have to play a lot more with the priorities so you figure this<BR>> > out, I would think.<BR>> ><BR>> ><BR>> ><BR>> > Can anyone explain what is causing this?<BR>> ><BR>> ><BR>> ><BR>> > I think the answer might be between the configuration settings you have got<BR>> > for both the BSR and CBSR.<BR>> ><BR>> ><BR>> ><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!<BR>> ><BR>> ><BR>> ><BR>> > If you don't want this box to participate the the multicast traffic then I<BR>> > would suggest you remove that port form the selected list, OR make the<BR>> > specified port that you want to be the BSR by using the priorities.<BR>> ><BR>> ><BR>> ><BR>> > Hope it helps.<BR>> ><BR>> ><BR>> ><BR>> > Regards<BR>> ><BR>> ><BR>> ><BR>> > Best Regards<BR>> > Fredrik<BR>> ><BR>> > X450a-48tdc.19 # sh igmp snooping<BR>> > Vlan Vid Port #Senders #Receivers Router Enable<BR>> > --------------------------------------------------------------<BR>> > SN102 164 6 Yes<BR>> > 19 2 No<BR>> > 20 5 No<BR>> > 21 3 Yes<BR>> > 45 0 Yes<BR>> ><BR>> > VLAN SN102 (164) Snooping=Enabled<BR>> > Group Sender Age<BR>> > 239.1.1.1 10.21.65.5 14<BR>> > 239.1.1.2 10.21.65.5 10<BR>> > 228.0.198.75 10.21.64.4 25<BR>> > 228.0.198.76 10.21.64.4 13<BR>> > 228.0.198.77 10.21.64.4 13<BR>> > 5 Incoming multicast streams<BR>> ><BR>> > Port Host Subscribed Age<BR>> > 19 10.21.64.2 225.10.10.10 66<BR>> > 19 10.21.64.2 226.10.10.10 63<BR>> > 20 10.21.64.3 224.2.127.254 67<BR>> > 20 10.21.64.3 224.2.127.255 69<BR>> > 20 10.21.64.3 234.5.6.7 63<BR>> > 20 10.21.64.3 239.1.1.1 64<BR>> > 20 10.21.64.3 239.1.1.2 61<BR>> > 21 10.21.64.4 228.0.198.75 68<BR>> > 21 10.21.64.4 228.0.198.76 63<BR>> > 21 10.21.64.4 228.0.198.77 60<BR>> > 21 10.21.64.4 All Groups 69<BR>> > 45 10.21.64.1 All Groups 1<BR>> ><BR>> ><BR>> ><BR>> ><BR>> ><BR>> > ________________________________<BR>> ><BR>> > Connect to the next generation of MSN Messenger Get it now!<BR>> ><BR>> > ________________________________<BR>> ><BR>> > Explore the seven wonders of the world Learn more!<BR>> ><BR>> > _______________________________________________<BR>> > extreme-nsp mailing list<BR>> > extreme-nsp@puck.nether.net<BR>> > https://puck.nether.net/mailman/listinfo/extreme-nsp<BR>> ><BR>> ><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>> > - -- http://www.i-hate-computers.demon.co.uk/<BR>> > ----------------------------------------------<BR>> ><BR>> ><BR>> ><BR>> > ________________________________<BR>> ><BR>> > Connect to the next generation of MSN Messenger Get it now!<BR>> ><BR>> > ________________________________<BR>> > Note: This message and any attachments is intended solely for the use of the<BR>> > individual or entity to which it is addressed and may contain information<BR>> > that is non-public, proprietary, legally privileged, confidential, and/or<BR>> > exempt from disclosure. 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