Scenario 7: Multicast

This scenario tests your knowledge of various multicast switching features. Think about how multicast traffic traverses a network and how switches can be configured to participate in building multicast topologies. Then consider how you can configure the switches to limit the forwarding of unnecessary multicast traffic.

1.	Under what conditions is IGMP snooping more suitable than CGMP for handling multicast traffic?
2.	Figure 19-7 shows a network diagram. Assume that all switches use the default multicast configurations. Where in the network will multicast traffic originating from PC-1 on Catalyst A (VLAN 101) be seen? Figure 19-7. Network Diagram for Scenario 7
3.	What configuration is needed on Catalysts C and D to limit multicast traffic to only those ports that explicitly join multicast groups, using CGMP with PIM dense mode? Assume that this is needed on both VLANs 101 and 102. What configuration is needed on Catalysts A and B, which are not capable of IGMP snooping?