Exam 350-501 topic 1 question 173 discussion

Actual exam question from Cisco's 350-501

Question #: 173
Topic #: 1

[All 350-501 Questions]

Why do packet loops occur during the configuration of BIDIR-PIM?

A. The network does not support BIDIR-PIM.
B. The network is partially upgraded to support BIDIR-PIM.
C. The router has not been configured to advertise itself.
D. No interface for carrying traffic for multicast groups has been configured.

Show Suggested Answer

Suggested Answer: B 🗳️
Reference:
https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9600/software/release/16-12/configuration_guide/ip_mcast_rtng/ b_1612_ip_mcast_rtng_9600_cg/configuring_pim.html

by KNOPPER at Oct. 1, 2020, 8:15 p.m.

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nolbi

Highly Voted 10 months, 4 weeks ago

The link is borken: This ist the new one: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9600/software/release/16-12/configuration_guide/ip_mcast_rtng/b_1612_ip_mcast_rtng_9600_cg/configuring_pim.html#task_hdt_bkk_mgb The discription is to find at this Topic: Configuring IPv4 Bidirectional PIM - Before you begin Before configuring bidirectional PIM, ensure that the feature is supported on all IP multicast-enabled routers in that domain. It is not possible to enable groups for bidirectional PIM operation in a partially upgraded network. Packet loops will occur immediately in networks that are only partially upgraded to support bidirectional PIM.

upvoted 15 times

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KNOPPER

Most Recent 1 year, 2 months ago

I think the answer isn't B, because you can have a partial- BIDIR deployment. Leaning towards answer D since you need to configure pim on the interfaces.

upvoted 1 times

beenardino

6 months ago

in case you missed the first comment "Before configuring bidirectional PIM, ensure that the feature is supported on all IP multicast-enabled routers in that domain"

upvoted 2 times

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