DPDK is not relevant because it lacks an OS layer.
OS settings are required
When performing TCP communication on a port with a changed MTU, issues may occur.
It is advisable to separate Ethernet used for Diretta from other communications.
HUBs and similar devices also have frame size limitations, so this configuration alone does not guarantee that jumbo frames will be usable.
Diretta Firmware PCIe USB Ethernet MTU setting
Lucia onboard ether MTU 2026
RaspberryPi5 onboard ether MTU 3058 （RaspberryPi4 only 1500
The others are EtherMTU
The settings may not always take effect.
Only if the network card being used supports it.
LIVA Z2