A server in the parks department sends jumbo frames that fit the access MTU but exceed what the underlay can carry once VXLAN headers are added. What planning issue does this expose?
Select an answer to reveal the explanation.
Short Explanation
The moving van fit in the driveway but not through the tunnel with the crate stacked on top. Access MTU isn’t enough—you need underlay headroom for the VXLAN wrapper. Size the whole path or watch silent drops and fragmentation drama.
Full Explanation
VXLAN adds outer Ethernet/IP/UDP/VXLAN overhead to each encapsulated frame. An access MTU that admits large frames can still produce underlay packets that exceed spine or core MTU. Operators should engineer end-to-end MTU (or safely reduce tenant MTU) so encapsulated packets traverse without relying on underlay fragmentation. This is a common cause of intermittent overlay loss in civic fabrics that enable jumbo frames only at the host edge.