5 ms·
I'm not a network engineer, but somehow I imagine that for at least some links fragmentation could be also handled transparently at lower layer, i.e. limit frag
by zokier 3y ago
I'm not a network engineer, but somehow I imagine that for at least some links fragmentation could be also handled transparently at lower layer, i.e. limit fragmentation to single hops and always reassemble packets before passing them on.
- Vecr 3y agoIt is. In my opinion that's what you should do if you can't provide 1500 MTU to your users directly.
- tptacek 3y agoHow is fragmenting and reassembling a better option than just communicating what the real MTU is so higher-layer protocols can adjust to it? What is the extra mechanism buying you?
- Vecr 3y agoAt this point lots of things don't work right otherwise, and assuming your users want to run wireguard over this link that takes them down to 1420, and if you're already at 1420 it takes them down to 1340... Anyway, you can probably use a lot less header overhead if you do it at a lower layer too.