This is the chassis-wide administrative switch controlling whether IGMP Snooping is configured on at all, as distinct from the operational state object that reports whether it's actually running. An admin who set this to enabled but sees the corresponding operational-state object still reporting disabled would know some dependency, such as licensing, resource limits, or a required reboot, is blocking the feature from actually activating despite the admin intent. A value of enabled here is the necessary but not sufficient condition for snooping to actually be running device-wide.