Setting Up The Igmp Snooping/Igmp Filtering - ZyXEL Communications IES-1248 Support Notes

IES 1248 Support Notes

Setting up the IGMP Snooping/IGMP Filtering

Without IGMP snooping multicast traffic is treated in the same manner as broadcast
traffic, that is, it is forwarded to all port. 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 the IP-DSLAM. IGMP filtering is for allowing a port to join
some specific IGMP groups. This can be applied in Video service providers. They can
only open some specific channels (groups) to specific ports.
Internet
Video
Server
Ethernet Port
IGMP
Router
Port 1
CPE
Video Client
s
37
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