Under ‘Video Over IP’ menu
Select ‘IPv4 Video Over IP Conguration’
Select ‘IGMP Snooping’
Tick ‘Enabled’ checkbox adjacent to IGMP Snooping Status
Tick ‘Enabled’ checkbox adjacent to IGMP Query Status
IGMP Snooping - IGMP Snooping Status
Conrm other settings match those as shown in the above image
Click ‘APPLY’ to update the setting