For a plain L2 multicast, you do not need to activate the IGMP Snooping feature at all. The multicast will be L2-flooded to all stations but only those stations that subscribed to the particular multicast group will process the frames. Also note, however, that the IGMP Snooping is activated by default on all Catalyst switches and it is not necesary to activate it explicitly.
If you do activate the IGMP Snooping in your particular topology then you must also activate the IGMP Querier function on your switch. The reason is that for the IGMP Snooping to work, the IGMP Membership Report messages must be continuously received by the switch. However, these messages are only sent from stations when initially subscribing to a multicast group, and later only as a response to a IGMP Membership Query message. These Membership Query messages are usually sent by multicast routers but you do not have any in your network. Therefore, your switch must be made responsible for originating these queries.
Assuming that the ports on your switch are placed into VLAN 1 and the IP network you're using is 10.0.1.0/24, these configuration commands should be added to your configuration:
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...