07-19-2019 07:59 AM
I am utilizing the IP 10G Ethernet Subsystem on a ZC706 to send data over the SFP.
Everything works fine until I want enable the jumbo frame setting. Data are still consumed on the AXI stream slave input (t_ready is high), but nothing is sent. I can not get any message with wireshark on the other side.
From PG072 it is only the tx_configuration_vector bit 4 I have to set.
I synthesized several times. Just the one bit in the config vector changed. Messages do not arrive, no matter what size I send.
07-19-2019 08:41 AM
I can not get any message with wireshark on the other side.
Have you enabled Jumbo Frame reception for your PC network card?
It is disabled by default.
07-22-2019 12:45 AM
thank you for the suggestion. Actually I have two Intel X710 cards. The link between two computers with these cards runs properly also with jumbo frames.
Only FPGA to PC with jumbo frames does not work.
10-16-2019 06:09 AM
Spoiler: The constant value is interpreted as decimal rather than hex (of what I thought). So 18 instead of 12 fixes it.