IGMP Query, Group Join & Leave

The Internet Group Management Protocol (IGMP) is used by routers and hosts to manage multicast group membership. This protocol flow describes the following IGMP operations:

• IGMP query Handling
• Hosts joining multicast groups
• Hosts leaving multicast groups

IGMP query, join and leave message flow.

You can click on individual message titles in the sequence diagram to see the complete contents of the message.

Click on the IGMP message titles in the flow…

…to see full field-level details for all IGMP messages.

The messages are also shown with a timestamp to give you an idea of the timer intervals involved in the message exchanges.

All IGMP messages are also shown with a timestamp that helps you understand the time gaps between messages.