NetComm NB9WMAXX User Manual page 50

Enable IGMP Snooping
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IGMP specifies how a host can register a router in order to receive specific multicast traffic.
IGMP Snooping allows the NB9WMAXX to capture IGMP frames. When your NB9WMAXX
hears an IGMP report from a host for a given multicast group it adds the host's port number
for that group. When the NB9WMAXX hears an IGMP Leave, it removes the host's port from
the table entry.
Without IGMP snooping, multicast traffic is treated in the same manner as broadcast traffic
- that is, it is forwarded to all ports. With IGMP snooping, multicast traffic of a group is
only forwarded to ports that have members of that group. IGMP Snooping generates no
additional network traffic, allowing you to significantly reduce multicast traffic passing
through your NB9WMAXX.
Save the settings.
Save and reboot with the settings applied.
NB9WMAXX ADSL+ VoIP Router
YML89 Rev1