Refer to the exhibit. A network engineer is configuring router R3 to handle multicast streams, but Host-2 cannot send subscription messages to the IPTV source. Which configuration must the engineer…

The correct answer is D. R3(config)# interface gigabitethernet 1/0/0. For Host-2 to send IGMP subscription (join) messages that R3 can process and forward upstream toward the IPTV source, PIM must be enabled on the interface of R3 that faces Host-2 (gigabitethernet 1/0/0). Without PIM enabled on that interface, R3 ignores IGMP reports from Host-2…

Multicast Routing

Question

Refer to the exhibit. A network engineer is configuring router R3 to handle multicast streams, but Host-2 cannot send subscription messages to the IPTV source. Which configuration must the engineer apply to router R3 so it passes the IPTV stream to Host-2?

Exhibit

Options

AR3# configure terminal
BR3# configure terminal
CR3(config)# interface gigabitethernet 1/0/0
DR3(config)# interface gigabitethernet 1/0/0

How the community answered

(53 responses)

A
4% (2)
B
17% (9)
C
6% (3)
D
74% (39)

Explanation

For Host-2 to send IGMP subscription (join) messages that R3 can process and forward upstream toward the IPTV source, PIM must be enabled on the interface of R3 that faces Host-2 (gigabitethernet 1/0/0). Without PIM enabled on that interface, R3 ignores IGMP reports from Host-2 and does not create multicast state or send PIM Join messages upstream. The correct configuration applies 'ip pim sparse-mode' (or the appropriate PIM mode) on interface gigabitethernet 1/0/0, enabling R3 to process IGMP membership reports from the local segment and participate in the multicast distribution tree for the IPTV stream.

Topics

#Multicast#IGMP#Router Interface Configuration#IPTV

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