To transport VXLAN traffic, which minimum MTU change, from a default MTU of 1500
bytes on the port, is required to avoid fragmentation and performance degradation?
A.
9100 bytes
B.
9114 bytes
C.
1650 bytes
D.
1550 bytes
Explanation:
VXLAN traffic is encapsulated in a UDP packet when sent out to the physical network.
This encapsulation imposes the following overhead on each packet:
Outer Ethernet Header (14) + UDP header (8) + IP header (20) + VXLAN header (8) = 50
bytes
To avoid fragmentation and possible performance degradation, all the physical network
devices transporting the VXLAN traffic need to handle 50 bytes greater than the
maximum transmission unit (MTU) size expected for the frame. Therefore, adjust the
MTU settings for all these devices, which will transport the VXLAN traffic.
http://www.cisco.com/c/en/us/products/collateral/switches/nexus-1000vswitch-vmware-vsphere/guide_c07-702975.html