Endpoint Learning on Egress Leaf Switches

B.

In Cisco Application Centric Infrastructure (ACI), endpoint learning is the process by which ACI fabric learns the location of endpoints such as servers, clients, and devices within the fabric. When traffic is received from an L3Out, an endpoint learning operation occurs on the egress leaf switch.

The L3Out is a connection to an external network, such as the internet or a different data center. When traffic from an external network enters the ACI fabric through the L3Out, the egress leaf switch is the first switch within the fabric to receive this traffic.

The egress leaf switch performs an endpoint learning operation on the traffic it receives from the L3Out. The purpose of this operation is to learn the source MAC and IP address of the traffic so that the ACI fabric can determine the correct endpoint location within the fabric.

Therefore, the correct answer is A. The source MAC and IP address of the traffic is learned as a local endpoint. This means that the egress leaf switch learns the source MAC and IP address of the traffic as a local endpoint, which allows the ACI fabric to direct traffic to the correct endpoint within the fabric.

Answer B, "The source MAC address of the traffic is learned as a remote endpoint," is incorrect because the source MAC address is learned as a local endpoint, not a remote endpoint.

Answer C, "No source MAC or IP address of the traffic is learned as a remote endpoint," is also incorrect because the source MAC and IP address of the traffic are learned as a local endpoint.

Answer D, "The source IP address of the traffic is learned as a remote endpoint," is incorrect because the source IP address is learned as a local endpoint, not a remote endpoint.