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Dell EMC Configuration Guide for the S4048T–ON System 9.14.2.4

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Leaving a Multicast Group

The following describes how a host can leave a multicast group.

  1. A host sends a membership report of type 0x17 (IGMP Leave message) to the all routers multicast address 224.0.0.2 when it no longer cares about multicast traffic for a particular group.
  2. The querier sends a Group-Specific Query to determine whether there are any remaining hosts in the group. There must be at least one receiver in a group on a subnet for a router to forward multicast traffic for that group to the subnet.
  3. Any remaining hosts respond to the query according to the delay timer mechanism (refer to Adjusting Query and Response Timers). If no hosts respond (because there are none remaining in the group), the querier waits a specified period and sends another query. If it still receives no response, the querier removes the group from the list associated with forwarding port and stops forwarding traffic for that group to the subnet.

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