We are facing a somewhat strange situation.
We have a server which is sending a multicast stream and which is connected to one of the ports of the 6509. on this 6509 we have also access switches connected. On all the switches we configured igmp snooping and on the 6509 we executed the command ip pim sparse-dense-mode.
Verifying the access switches, everything works as designed. The multicast flows only go to the ports which have requested to receive the flow.
However on the 6509 we are facing the situation that all the traffic coming from the multicast server is sent to all the ports. However this is something we do not like to have. So why is the 6509 sending the multicast stream to all the ports eventhough igmp snooping has been configured? Is there anything more we have to do on the 6509?
Thanks a lot for your support and if you need more information, just let me know.
I've given a look at bug toolkit for C6509 and 12.2(18)SXD6 and there are 31 bugs listed for IGMP. Some are related to IGMP snooping
I would suggest to try to upgrade to a newer IOS image and to try with it
what IOS image to choice depends on how is populated the chassis, if there are only standard linecards you could use 12.2(33)SXH5 if you have service-modules like FWSM or CSM or ACE you would need 12.2(33)SXI2 or later.
Hope to help