Multicast Notes

Well Known Multicast Addresses

224.0.0.1 - All Hosts
224.0.0.2 - All Multicast Routers
224.0.0.9 - RIPv2 Routers
224.0.0.10 - EIGRP Routers
224.0.0.12 - HSRPv2
224.0.0.13 - PIM Routers
224.0.0.22 - IGMPv3
224.0.1.1 - NTP
224.0.1.39 - Cisco-RendezvousPoint-Announce
224.0.1.40 - Cisco-RendezvousPoint-Discovery
232.0.0.0/8 - Reserved for SSM
233.0.0.0/8 - GLOP address range

PIM (Protocol Independent Multicast)

• Protocol independent means that it can work with any unicast routing protocol 
• Pim can be implemented in three modes: sparse mode, dense mode and sparse-dense mode.