Quick Answer
The correct answer is to create a multicast policy in the bridge domain. This is necessary because Cisco ACI handles multicast forwarding at the bridge domain level, where the multicast policy enables IGMP snooping and manages multicast group membership across the fabric. Unlike traditional networks, ACI does not require PIM on leaf switches; instead, the policy-driven approach allows the fabric to intelligently forward multicast traffic only to ports that have joined the group, ensuring efficient bandwidth use. On the Cisco DCCOR and CCNP Data Center Core 350-601 exam, this concept tests your understanding of how ACI abstracts Layer 2 and Layer 3 multicast configuration, often appearing as a trap where candidates mistakenly look for PIM or OSPF settings. A common memory tip: remember that in ACI, multicast lives in the bridge domain—think “BD for Broadcast and Multicast Domain”—so the policy is always applied there, not on the interface or tenant level.
This 350-601 practice question tests your understanding of network. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An administrator is deploying a new application in a Cisco ACI fabric. The application requires multicast traffic between end hosts. Which configuration is necessary for multicast in ACI?
Enable PIM on the leaf switches.
Why wrong: ACI uses IGMP snooping and proxy, not PIM.
Configure a multicast group in the EPG.
Why wrong: No such configuration exists in ACI.
Create a multicast policy in the bridge domain.
A multicast policy in the bridge domain enables multicast forwarding.
Use IGMP snooping only.
Why wrong: IGMP snooping alone is insufficient for multicast routing.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Create a multicast policy in the bridge domain.
In Cisco ACI, multicast forwarding is enabled at the bridge domain level using a multicast policy. This policy configures the necessary IGMP snooping and multicast group membership for the fabric, allowing end hosts to receive multicast traffic without requiring PIM on the leaf switches. Option C is correct because the bridge domain multicast policy is the required configuration for multicast in ACI.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Enable PIM on the leaf switches.
Why it's wrong here
ACI uses IGMP snooping and proxy, not PIM.
Configure a multicast group in the EPG.
Why it's wrong here
No such configuration exists in ACI.
Create a multicast policy in the bridge domain.
Why this is correct
A multicast policy in the bridge domain enables multicast forwarding.
Related concept
Read the scenario before looking for a memorised answer.
Use IGMP snooping only.
Why it's wrong here
IGMP snooping alone is insufficient for multicast routing.
Common exam traps
Cisco often tests the misconception that PIM must be enabled for multicast in ACI, but the fabric's overlay uses head-end replication and IGMP snooping at the bridge domain level instead.
Detailed technical explanation
ACI uses head-end replication for multicast, where the ingress leaf switch replicates multicast packets to all egress leaf switches that have interested receivers, rather than building a multicast distribution tree. The bridge domain multicast policy controls IGMP snooping, querier settings, and multicast group ranges (e.g., 224.0.0.0/4), and it must be enabled for multicast traffic to flow between EPGs. In a real-world scenario, failing to configure this policy results in multicast traffic being dropped even if IGMP snooping is active on the endpoints.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the 350-601 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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FAQ
Network — This question tests Network — Read the scenario before looking for a memorised answer..
The correct answer is: Create a multicast policy in the bridge domain. — In Cisco ACI, multicast forwarding is enabled at the bridge domain level using a multicast policy. This policy configures the necessary IGMP snooping and multicast group membership for the fabric, allowing end hosts to receive multicast traffic without requiring PIM on the leaf switches. Option C is correct because the bridge domain multicast policy is the required configuration for multicast in ACI.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This 350-601 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-601 exam.
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