HPE Aruba Certified Professional (ACP) – SD-WAN — Question 106

After configuring IGMP snooping on a Layer 2 VLAN, multicast applications are no longer working. Which additional configuration step is required?

Answer options

• A. Enable IGMP snooping on the Layer 3 interface for the VLAN.
• B. Enable IGMP on the Layer 3 interface for the VLAN.
• C. Enable PIM-SM on the Layer 3 interface for the VLAN.
• D. Enable PIM-DM on the Layer 3 interface for the VLAN.

Correct answer: B

Explanation

Enabling IGMP on the Layer 3 interface for the VLAN is necessary because it allows for the management of multicast group memberships, which is critical for multicast traffic to function correctly. The other options, while related to multicast routing, do not directly address the need for IGMP to manage group memberships in a Layer 3 context.