
Configuring IP Multicasting and Multimedia Services
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Configuring an AS Boundary Router for Use with IGMP Relay
An IGMP-R device communicates with a router configured as an MOSPF AS
boundary router. To configure a router for use with an IGMP-R device, you must
do the following:
• Configure the router as an MOSPF AS boundary router. For information on
OSPSF, see Configuring IP Services. For information on MOSPF, see
Chapter 5
.
• Set the MOSPF Multicast Downstream IGMP Relay parameter to Enabled.
For information, see “Configuring Multicast-Capable External Routes” on
page 5-11.
• Configure RIP globally on the MOSPF boundary router. For information
about RIP, see Configuring IP Services.
• Add MOSPF and IGMP to each interface that connects the router to the
multicasting domain.
• Add RIP, MOSPF, and IGMP to the downstream interface that connects the
router to the IGMP-R device. Note that MOSPF is configured on the multicast
interface only. As a unicast device, IGMP-R does not run MOSPF or any
other multicast protocol on the upstream interface to the MOSPF boundary
router.
• Add RIP to the downstream interface that connects the MOSPF boundary
router with the IGMP-R device.
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