Dear Stefano Babic,
Hi Marek,
On 15/10/2013 23:19, Marek Vasut wrote:
Forget this, the issue is still present. Damn!
It's at least a little clearer to me what happens now. The FEC fails to transmit an TFTP block ACK packet -> the server waits 5 seconds -> sends ARP packet -> FEC replies and resends the TFTP block ACK again. Why does the FEC swallow a TX packet, I don't know.
Anyway, it is strange that this happens only with this board. It appears as the SOC sends or thinks to have sent, but the packet is corrupted or not sent at all on the physical layer. Maybe you can check on the other side of the connection on the switch and/or on the server, if some errors are detected.
This happens on multiple boards and we're sometimes getting reports about this issue. So this is not a single board issue. Maybe we should figure out what do these boards have in common.
Best regards, Marek Vasut