“After some heated discussions about packet sizes on the mailinglist of the IETF v6ops working group, I decided to do some measurements to find out what maximum packet sizes are supported on today’s internet.”
“The data showed no fewer than 72 different MTU sizes for IPv4, ranging from 576 to 9198 bytes. However, both of these extremes only showed up once, and other values below 1280 and above 1500 are also quite rare”