this post was submitted on 06 Jul 2023
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How do you feel about the internet being "stuck" with an MTU of 1500?
This is kinda the problem with widely deployed standards like TCP/IPv4: if you have even one device out there that's on the "old" standard, it won't be able to talk under a hypothetical new standard like IPv6 or TCP-with-huge-packets. And there are a lot more than one device out there that would be cut off.
As I understand it, the big pipes have very large MTUs now, and the edge routers cut up the packets for further transport. That's probably the only way we can realistically go forward.
I hope soon with ipv6 MTU discovery, as home connections get faster, the inefficiencies of a small MTU will drive offerings of dynamic/large MTUs.