Before cutover, county courts must confirm the campus underlay can carry fabric overlay traffic. Which MTU validation focus is most appropriate for SD-Access VXLAN encapsulation?
Select an answer to reveal the explanation.
Short Explanation
VXLAN is like putting a parcel in a thicker shipping box—you need wider conveyor belts. If the underlay MTU is sized only for bare IP, the boxed overlay frames get stuck. Prove end-to-end MTU can swallow VXLAN overhead before opening day at the courts.
Full Explanation
VXLAN encapsulation increases frame size relative to the original Ethernet/IP packet, so underlay interfaces and paths must support a sufficiently large MTU (commonly jumbo or carefully engineered values per design guide). Validating end-to-end underlay MTU before cutover prevents silent overlay drops and PMTUD pain. Focusing only on CAPWAP or deliberately undersizing underlay MTU does not prepare a wired fabric overlay.