Zyxel Switches from GS1900-10HP up to XGS4600 and ADSL/VDSL DSLAM allow us to drop Multicast in the local Network. The benefit of this is that Switch doesn’t flood Multicast in hole Network.
Go to Multicast Setup under Advanced Applications and select here IPv4 Multicast:
Go to IGMP Snooping:
Set both options to Drop and apply:
Now Multicast will be dropped in your Network.