Cisco Updated 300-620 Exam Questions and Answers by kylian

To support the addition of new ESXi hosts to the existing VMM domain, the action that should be taken is to map the leaf interface selector to the AEP that is associated with the VMM domain (Option D). This ensures that the correct policies are applied to the interfaces where the new ESXi hosts are connected.

When extending an EPG out of the ACI fabric using static path binding, it is true that external endpoints are in the same EPG as the directly attached endpoints8. This means that traffic received on a statically bound leaf port with a specific VLAN ID is mapped to the EPG, and the same policies applied to directly attached endpoints are enforced on the external endpoints8.

In the Cisco ACI environment, when an engineer wants to enforce a specific path for ICMP replies and prevent packets from taking a direct path, setting Layer 2 Unknown Unicast to Hardware Proxy on the bridge domain (BD1) is the appropriate action. This setting ensures that the unknown unicast traffic, which includes ICMP packets destined for an unknown MAC address, is forwarded to the spine proxy. The spine proxy then forwards the packets based on the endpoint table information, ensuring that the packets follow the expected path through the fabric and do not take any shortcuts or direct paths that bypass the intended routing.

In a two-pod Cisco ACI Multi-Pod environment, it is recommended to deploy no more than two Cisco APIC controllers in the same pod to avoid losing all replicas of a shard if a pod fails. TheAPIC cluster is a distributed system where each APIC contains a replica of the configuration database, referred to as a shard. If all replicas of a shard were located in the same pod and that pod were to fail, it would result in the loss of the shard and potentially impact the entire fabric’s operation. By distributing the APIC controllers across pods, the risk of losing all replicas due to a single point of failure is mitigated, enhancing the overall resiliency of the system1.

References :=

ACI Multi-Pod White Paper - Cisco1