A city runbook sets underlay interface MTU higher than the overlay payload size requires, specifically to leave headroom for encapsulation. Which IP fabric best practice does that reflect?
Select an answer to reveal the explanation.
Short Explanation
VXLAN wraps the original frame like a shipping sleeve—if the truck bed (underlay MTU) is not a bit longer than the box, something gets crushed. Bump underlay MTU so the sleeve fits.
Full Explanation
VXLAN adds encapsulation overhead (UDP/IP plus VXLAN header). Best practice is to increase underlay MTU so tenant frames of the designed size traverse without fragmentation or silent drops. Setting underlay MTU lower than overlay needs, ignoring overhead at 1500, or disabling jumbos as a blanket rule works against fabric MTU hygiene.