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CHAPTER 8: IGMP APPLICATION
IGMP is an acronym for Internet Group Management Protocol. It is a communications protocol used to manage the membership
of Internet Protocol multicast groups. IGMP is used by IP hosts and adjacent multicast routers to establish multicast group
memberships. It is an integral part of the IP multicast specification, like ICMP for unicast connections. IGMP can be used for online
video and gaming, and allows more efficient use of resources when supporting these uses.
Video Server
PIM
Local Multicast Router
Router 1
Multicast Router
Video Client
L2 switch
with IGMP snooping
IGMP
IGMP
UDP/RTP multicast
traffic
LAN
FIGURE 8-1. IGMP INSTALLATION
8.1 E X AM P LE 1
To configure every client to get a multicast stream, go to “Configuration —> IPMC —> Basic Configuration” and select the “Snooping
Enable” check box.
FIGURE 8-2. SNOOPING ENABLED CHECKBOX
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