ZyXEL Communications GS1920 User Handbook Manual page 58

4. Go to Advanced Application > Multicast > IPv4 Multicast > IGMP
Snooping, to set up IGMP-Snooping. Active the IGMP Snooping and
choose the Unknown Multicast Frame to Drop. Click Apply.
Figure 4, Advanced Application > Multicast > IPv4 Multicast > IGMP
Snooping
Verify
1. Client use VLC to send the IGMP-Join to group 239.239.239.1 or
239.239.239.2. Go to Advanced Application > Multicast > IPv4 Multicast,
the group entry has recorded on IGMP-Snooping table.
Figure 5, Advanced Application > Multicast > IPv4 Multicast
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