— Exhibit –-
— Exhibit —
An administrator configures an NSX network as shown:
Both VM-A and VM-B use the same Distributed Router for their default gateway. VM-B receives an
IP message from VM-A.
What is the source MAC address of the IP message received by VM-B?
A.
VM-B’s default gateway’s MAC address.
B.
VM-A’s MAC address.
C.
VM-A’s default gateway’s MAC address.
D.
Logical Switch 7321’s MAC address.
I strongly believe this answer is wrong see also question 136. The answer would be correct if VM-A resides on a different subnet.
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Agreed. With the other post. The answer is VM-A’s mac address. Why would the packet go through the default gateway in order to access a VM on the same segment?
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As there is no router involved correct would be B. Only with different subnets the Distributed Logical Router would be shown.
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The Answer is “B” because the VXLAN Frame contains both Source and Destination of the MAC address learned from the VTEP Cache. Refer the design guide Unicast Traffic (Virtual to Physical Communication) page 43
1. VM1 generates a data packet directed to VM2.
2. ESXi-1 learned about the location of VM2 from the ARP report received from the controller (control plane learning),so it encapsulates the packet originated by VM1 in a VXLAN packet destined to the VTEP of ESXi2 (10.20.10.11).
3. ESXi-2 receives the packet and while decapsulating it, it leverages the information in the external IP header to learn about the location of VM1 (associating VM1 MAC and IP addresses to the VTEP of ESXi-1). This is an
example of data plane learning for a VM specific location.
4. The frame is delivered to VM2.
Note: now that both ESXi-1 and ESXi-2 have populated their local tables, traffic can flow in both directions.
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See question 43, it’s same question, but there the correct answer is “VM-A’s Mac address”. I think this is the correct answer (VM-A’s Mac address).
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The answer is VM-A Mac Address.
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So, what if this shows up twice in an exam? 🙂
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The picture is wrong here. Here it duplicates the picture from Q43, however in real Pearson test it’s the same as in Q52.
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