Configuring IP Multicasting and Multimedia Services
9-2
117355-D Rev 00
IGMP Relay Overview
An IGMP Relay device is a unicast router with an interface to a multicast router
and interfaces to one or more networks containing network hosts. Figure 9-1
shows an IGMP Relay device connected to three LANs containing host systems.
Figure 9-1. IGMP Relay Device
The IGMP Relay device provides the following group registration services for an
IP multicast router:
• Sends IGMP host membership queries to hosts on its attached local networks
• Receives host membership reports and unsolicited join messages from hosts
on its attached networks and forwards them to the attached multicast router
• Forwards multicast data to group members on locally attached networks
For more information about IGMP, see Chapter 3, “Configuring and Customizing
IGMP.”
IP0077A
IGMP Relay
IP
multicast
router
LAN A
LAN B
LAN C
Commentaires sur ces manuels