Message Types

• Membership Query

• • Used by multicast routers to ask multicast hosts to identify themselves and the groups of which they are members

• Membership Report {v1,v2,v3}

• • Used by hosts and routers to join a group using IGMP{v1,v2,v3}

• DVMRP

• • Used for router-to-router communication for DVMRP

• PIM

• • Used for router-to-router communication for PIM

• Leave

• • Used by hosts and routers to leave a group