igmp and multicasting

[detectiveinspekta]

Wanting to setup a test IPTV setup.

I have a rasberry pi running dvblast multicasting a channel to 10.255.0.9:2000. I have two other computers connected to the C2960-LANBASE-M Version 12.2?. 

Problem is when I enable igmp snooping on my vlan multicast traffic still appears on all the ports (no video player is running). I have also used the commands switchport block multicast and storm-control multicast level 0 but I can still view the channels just fine.

show ip igmp snooping groups shows nothing.

10.255.0.9 is a multicast address so I'm thinking that the switch is just not recognizing this as multicast. 

[chrihussey]

10.255.0.9 is not a multicast address and would not be recognized as one by the switch. The 239.0.0.0/8 group is generally used for private use.

http://www.cisco.com/c/en/us/td/docs/ios/solutions_docs/ip_multicast/White_papers/mcst_ovr.html

[detectiveinspekta]

Sorry, the correct address was 239.255.0.9. 

[chrihussey]

OK, no problem.

Having trouble understanding the issue. You say no video player is running, yet all ports show a multicast stream? How is this being determined and is it the 239.255.0.9, or something else. If so what?

I believe IGMP snooping is enabled by default on the 2960, so what do you mean by enabling it on the VLAN?

Just trying to get a clearer picture. 

[detectiveinspekta]

I can see from the lights on the switch that its streaming multicast on all ports. Verified by using wireshark on those host computers and could see multicast packets at 239.255.0.9

I was thought to believe IGMP snooping feature will allow through multicast data on that particular port only if the host computer requested it. Eg using VLC to open rtp stream. 

ATM multicast data is on all the ports.

[chrihussey]

Agree with you that you should only see the multicast packets on ports where hosts request joins to the particular group and you should see them with the "sh ip igmp snooping groups" command. I have a 2960 and verified this and it works that way.

Admittedly, it is not clear to me what you mean by "ATM multicast data", but if you could explain it there might be something there.

Other than that if you' like to post a sanitized config it may also help.