Operation Manual

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5. Go to IP Application > IGMP, active the IGMP router and select the Drop
for unknown Multicast Frame and enable the IGMP-v2 for VLAN 20
interface. Unknown Multicast Frame Drop is able to discard IGMP packets
flooding to all ports. Switch will send the General-Query when user
enables IGMP-Version on VLAN interface. Click Apply.
Figure 6 IP Application > IGMP