D-Link DES-3624 - Switch - Stackable User Manual - page 120
Manual is about: Stackable NWay Ethernet
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Stackable NWay Ethernet Switch User’s Guide
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Web-Based Network Management
IGMP Settings
Figure 7-17. IGMP Configuration window
To configure the IGMP, enter a value between 30 and 999 seconds in the IP Multicast Filtering Age-out Timer field and
then change the IP Multicast Filtering (IGMP Snooping) setting from Disabled to Enabled. Click the Apply button to let
the changes take effect.