City monitoring shows a leaf encapsulating frames, yet the remote h…

Question

City monitoring shows a leaf encapsulating frames, yet the remote host MAC never appears and traffic fails. How should troubleshooting be split?

Accepted Answer

Isolate whether the break is underlay reachability, VNI membership, or MAC learning/control-plane distribution—not assume encapsulation alone means end-to-end success — Wrapping boxes is not the same as the far warehouse stocking the shelf. Encapsulation counters say the local leaf tried; they don’t prove underlay delivery, VNI join, or EVPN/MAC learning worked. Split the problem: road, membership, then learning.

Answer

Replace all optics first because encapsulation counters prove the control plane is perfect

Answer

Disable VXLAN city-wide and extend VLANs with spanning tree as the only next step

Answer

Assume the server NIC driver is the sole fault whenever encapsulation counters increment

City monitoring shows a leaf encapsulating frames, yet the remote host MAC never appears and traffic fails. How should troubleshooting be split?

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