ZyXEL Communications IES1248 manual Setting up the Igmp Snooping/IGMP Filtering, Internet, Port

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

s Video Client

37

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