CCDE Practical Exam — Question 23

An engineer configures a Cisco ACI Multi-Pod for disaster recovery. Which action should be taken for the new nodes to be discoverable by the existing Cisco
APICs?

Answer options

• A. Enable subinterfaces with dot1q tagging on all links between the IPN routers.
• B. Configure IGMPv3 on the interfaces of IPN routers that face the Cisco ACI spine.
• C. Enable DHCP relay on all links that are connected to Cisco ACI spines on IPN devices.
• D. Configure BGP as the underlay protocol in IPN.

Correct answer: B

Explanation

Option B is correct because configuring IGMPv3 allows for efficient multicast group management, which is essential for the discovery of new nodes in a Multi-Pod environment. The other options do not directly relate to the discoverability of nodes by the existing APICs; for example, enabling subinterfaces or DHCP relay do not facilitate the necessary multicast communication required for node discovery.