ZyXEL Communications B-5000 - Manuel d'utilisateur télécharger pdf (Page 29)

IES-5000 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.

ADSL/SHDSL

CPE

Video

Server

Internet

Ethernet Port

Video Client

Port 1

IGMP

Router

IES-5000(ALC/SLC)

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ZyXEL Communications B-5000 - Manuel d'utilisateur Page 29