300-510 SPRI: Implementing Cisco Service Provider Advanced Routing SolutionsDemo

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QuestionQ240

Multicast Routing

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Refer to the exhibit. HostB receives an IPTV traffic stream from the multicast source at 192.168.10.1. If router RB is powered down, multicast traffic forwarding to downstream peers is affected. Routers RA and RB are in the same physical location. Which two configurations must be implemented so that HostB receives the multicast stream even when RB is powered down?

Choose two
  • A Set the backup RP address to 10.10.10.3 on routers RY and RZ.
  • B Enable PIM SSM mode on routers RA and RY.
  • C Set the RP address to 10.10.10.4 on all routers.
  • D Enable PIM sparse mode on routers RC and RZ with a static RP address of 10.10.10.1
  • E Enable bi-directional PIM on all routers.
Explanation

PIM Source-Specific Multicast on RA and RY builds source-specific receiver joins toward 192.168.10.1 and does not require an RP. PIM sparse mode on RC and RZ, using the reachable RA address (10.10.10.1) as a static RP, maintains multicast control-plane operation and provides the alternate RZ–RY–RA path after RB fails.

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