2 ms·
There's PMTUD that doesn't depend on ICMP.
by cryptonector 3y ago
There's PMTUD that doesn't depend on ICMP.
- zamadatix 3y agoFor TCP in Linux the only thing I know of is net.ipv4.tcp_mtu_probing=2 which is still slower than clamping at the edge. You can also run into weird slowdowns in cases with packet loss even after the initial discovery. If you don't have a way to clamp but absolutely need the interface to have jumbo enabled for local traffic performance it's probably the best fallback but even then I'm not sure it's worth the extra headache it causes.