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Cisco 2950 igmp-snooping multicast support

I have a cisco 2950 switch is receiving multicast traffic from Juniper router, there are two multicast mpeg-2 receivers connect to 2950 switch, the first receiver joins multicast group and the second receiver joins multicast group igmp-snooping was also turn on in the switch, I plug my PC with sniffer software installed( without multicast software) into switch, the packet trace still shows that the port PC attached to was receiving both multicast groups traffic( my PC should not see any Multicast traffic). but result of show mac-address-table multicast shows the right Multicast group and associated ports.

ASCNYBW01#show mac-address-table multicast vlan 2

Vlan Mac Address Type Ports

---- ----------- ---- -----

2 0100.5e00.0001 IGMP Fa0/17, Fa0/18

2 0100.5e00.0003 IGMP Fa0/17, Fa0/18

2 0100.5e00.0005 IGMP Fa0/17, Fa0/19

2 0100.5e78.0505 IGMP Fa0/17

so It looks like igmp snooping feature is not working on this switch as it suppose to.

The IOS on this 2950 switch is lastest code 12.1.12c. any idea???



Re: Cisco 2950 igmp-snooping multicast support

I have not seen this problem before, here is a link with more information on setting up IGMP Snooping on the 2950. Hope that helps: