Join Process

Join Process
The other processes are joining and leaving multicast groups. Both of these processes are
quite simple and straightforward. You understand how interfaces are maintained in an
active state through Membership Queries. The query process runs only every 60 seconds.
If a host wants to join a multicast group outside the Membership Query interval, it can simply
send an unsolicited report to the multicast router stating that it wants to receive data for
the specified multicast group. Figure 19.9 depicts how this occurs. This is known as the
IGMP Join process.