ZyXEL Communications IES-5005 manual IGMP Snooping/IGMP Filtering Application, Igmp, Ethernet Port

IES-5000/5005/6000 Support Notes

IGMP Snooping/IGMP Filtering Application

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 the IP-DSLAM. IGMP filtering allows a port to join specific IGMP groups. This feature is useful for video service providers as they only need to allow certain, but not all, channels (or multicast groups) on specific ports.

Internet

Video

Server

IES-5000(ALC/SLC)

IGMP

	Ethernet Port	Router
	Port 1
	ADSL/SHDSL
	CPE
Video Client

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