Discover how changing the Layer 2 unknown unicast policy from Flood to Hardware Proxy affects traffic handling in a Cisco ACI fabric. Learn about the role of leaf switches in managing unknown unicast traffic when the destination endpoint is not present in the endpoint table.
Table of Contents
Question
An engineer configured Layer 2 extension from the ACI fabric and changed the Layer 2 unknown unicast policy from Flood to Hardware Proxy. How does this change affect the flooding of the L2 unknown unicast traffic?
A. It is forwarded to one of the spines to perform as a spine proxy.
B. It is flooded within the whole fabric.
C. It is dropped by the leaf when the destination endpoint is not present in the endpoint table.
D. It is forwarded to one of the APICs to perform as a proxy.
Answer
C. It is dropped by the leaf when the destination endpoint is not present in the endpoint table.
Explanation
C. When the Layer 2 unknown unicast policy is changed from Flood to Hardware Proxy in a Cisco ACI fabric, and the destination endpoint is not present in the endpoint table, the leaf switch drops the traffic. The leaf switch acts as a proxy and does not flood the unknown unicast traffic within the fabric or forward it to other components such as spines or APICs.
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