Municipal operators see DF-bit related drops and fragmentation symptoms for VXLAN-encapsulated traffic. What is the preferred data-plane approach?
Select an answer to reveal the explanation.
Short Explanation
Fragmenting tunnel packets across the underlay is like shipping a sofa in unmarked pieces through three different couriers—things go missing. Prefer correct MTU so VXLAN stays whole end to end. Don’t build the city fabric on reassembly luck.
Full Explanation
Fragmentation of encapsulated VXLAN traffic in the underlay is fragile and often interacts poorly with the Don’t Fragment bit and middleboxes. Best practice is to provision MTU so outer packets traverse intact from ingress VTEP to egress VTEP. Depending on hop-by-hop fragmentation increases loss and complicates troubleshooting. Civic runbooks should treat DF/fragmentation symptoms as an MTU-engineering problem first.