Configure multiple multicast sources and groups via IGMP

Configure and verify PIM sparse-dense mode operation and adjacencies

Configure and verify automatic rendezvous points and mapping agents

Force PIM sparse-dense mode to fail over to dense mode operation

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Content Summary This module covered IP multicast benefits and the types of applications supported. To achieve IP multicast forwarding, proper addresses for multicast groups must be assigned, then a tree is constructed from each source to the users that have joined the group. The tree is built using Reverse Path Forwarding (RPF). There are two type of trees: source and shared. The protocol to support multicast users joining a multicast group is Internet Group Management Protocol (IGMP). A multicast routing protocol is required at Layer 3, and the choices are Protocol Independent Multicast dense mode (PIM-DM), PIM sparse mode (PIM-SM), or PIM sparse-dense mode. In PIM-SM, a shared distribution tree process is used, and an RP is required. Layer 2 Ethernet switching issues are resolved with IGMP snooping or Cisco Group Management Protocol (CGMP). Cisco IOS software provides a full set of configuration and verification commands for the implementation of IP multicast.