Question 310
At the Aspen agricultural office, short management packets pass through the DMVPN, but larger TCP sessions repeatedly stall after encapsulation. Which underlying technical condition best accounts for this evidence?
Explanation
Correct Answer
The evidence at the Aspen agricultural office supports this condition: Encapsulation reduces effective payload MTU, causing large packets to fragment or be dropped. The associated fix is: Set appropriate tunnel MTU and TCP MSS handling based on GRE/IPsec overhead and verified PMTUD behavior.
Incorrect Answers
The observation at the Aspen agricultural office does not point to mpls vpn per-vrf forwarding lookup; it points to a different condition. Encapsulation reduces effective payload MTU, causing large packets to fragment or be dropped.
This diagnoses a different mechanism: IKE identity authentication succeeds, but IPsec data-plane proposals are incompatible. The reported symptom at the Aspen agricultural office instead concerns gre over ipsec mtu and mss.
That diagnosis belongs to dmvpn nhrp authentication mismatch, while the observation at the Aspen agricultural office points to gre over ipsec mtu and mss.