On Mon, 8 Feb 2021, BERTRAND Joël wrote:
Can you turn off jumbo frames on wm0 and on the NAS? Seeing a window size smaller than the frame size is a bit weird.Today, I cannot. But when this nas was connected to a Realtek adapter, I have the same throughput with a standard MTU (driver raises panic when MTU was greater than 1500).
Nevermind. I was looking at the wrong lines. euclide who is receiving data here has the correct bigger window: 14:06:09.023375 IP euclide.systella.fr.iscsi-target > legendre.systella.fr.65508: Flags [P.], seq 79153:79201, ack 108213648, win 24576, options [nop,nop,TS val 43049472 ecr 642769], length 48 -RVP