IGMP snooping prevents report suppression

Multicast hosts won't reply to a membership query message when they see a membership report from another host:

IGMP report suppression

However, switches with IGMP snooping enabled intercept membership reports from hosts. This means that hosts never see each other's membership reports, and all of them will send a membership report (instead of one per group).

The switch ensures that only a single membership report is forwarded to the multicast router.



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