This is the blog of Ronald Bartels that wanders on and off the subject of problem management (that is how it started), but it is best described by Ray who says this is Daddy's thoughts! Like the best music is from the Eighties and a wee dram helps in solving most inconveniences.
MTU: Misunderstood Thing Unknown
Maximum Transmission Unit (MTU).
It’s the hidden and all-important “bucket” that moves around all of the
data we create and consume on an IP based network, such as the
Internet. The often cursed (and almost always the last thing to be
checked when troubleshooting a network problem) MTU lives in infamy as a
foundational (but yet forgotten) piece of internetworking lore.