Avaya Configuring IP Multicasting and Multimedia Services Manual do Utilizador descarregar pdf (Página 198)

Configuring IP Multicasting and Multimedia Services

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117355-C Rev 00

Configuring a DVMRP Router for Use with IGMP Relay

An IGMP Relay device can provide host registration services for a multicast

router running DVMRP:

• If the IGMP Relay device is running RIP on its upstream IP interface, you

must add RIP to the downstream IP interface on the multicast router. RIP

advertises its locally attached networks to the multicast router. The multicast

router stores the routes in its IP unicast routing table.

• If the IGMP Relay device is running OSPF on its upstream IP interface, you

must add OSPF to the downstream IP interface on the multicast router. OSPF

advertises its locally attached networks to the multicast router. The multicast

router stores the routes in its IP unicast routing table.

• If the IGMP Relay device is running no unicast routing protocol to advertise

routes to its locally attached networks, you must statically add the routes to

the IP unicast routing table on the multicast router.

All three of these methods produce the same result: they ensure that the IP unicast

routing table on the multicast router contains routes to the networks locally

attached to the IGMP Relay device. However, DVMRP -- which builds its own

routing table separate from the IP unicast routing table -- has no knowledge of the

networks.

To make the routes known to DVMRP, you configure a DVMRP accept policy --

inject unicast routes -- that specifies the routes. DVMRP copies the routes from

the IP unicast routing table and injects them into the DVMRP routing table.

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Avaya Configuring IP Multicasting and Multimedia Services Manual do Utilizador Página 198