Click the Exhibit button.
You have created a GRE tunnel as shown in the exhibit. The router with tunnel endpoint A is dropping the packets originating from User A and destined to User B.
What would cause this problem?
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JN0-349 Exam - Question 40
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Correct Answer: D
The issue arises because User A is sending maximum size default Ethernet frames with the DF (Don't Fragment) bit enabled. The MTU (Maximum Transmission Unit) for the tunnel is set to 1476 bytes, which is less than the standard Ethernet MTU of 1500 bytes. Since the DF bit is enabled, the packets cannot be fragmented to fit within the 1476-byte limit of the GRE tunnel. This discrepancy in packet size causes the router at tunnel endpoint A to drop the packets. Disabling the DF bit or reducing the packet size can resolve this issue.
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1 commentjulin_10Option: D
Dec 15, 2023D. User A is sending maximum size default Ethernet frames with the DF bit enabled.