IGMP Snooping

IGMP Snooping allows switches to identify which ports multicast group members hosts are attached to, in order to optimize the distribution of multicast traffic.

Some common use-cases for IGMP Snooping are:
The IGMP Snooping feature can be configured in multiple locations, in an overriding hierarchy, listed in order of priority:When IGMP Snooping is not configured, the higher-level settings take effect. For example, if device specific VLAN IGMP settings are set to disabled, the VLAN attributes settings for the VLAN take effect.