W3150A TCP - FTP issue

Question

Hi, “back again”, got UDP / DHCP working, but now: i got trouble with file transfer (TCP - FTP), need it for firmware download. Wireshark shows a lot of “TCP Dup Ack” and “TCP Retransmission”. Also the W3150 chipset sends “ACK” always after retry counter was running down (0.4 sec.). I would like to send you a screenshot of wireshark capture. How can i do that ? Many thanks. Best Regards: Alfred Ferchau

Eugeny · Answer

alfred: would like to send you a screenshot of wireshark capture. Better attach Wireshark log.

alfred · Answer

Hi Eugeny, o.k., now i got it, wireshark log is here: https://uploadfiles.io/dranp some remarks: It was running on with FileZilla 2.2.22 on XP, because the machine computers are XP. Set Filter of wireshark to: ip.addr == 192.168.178.123 FileZilla / PC is 192.168.178.123, Chipset W3150 is 192.168.178.123 Problem is : 1.: lots of TCP DUP ACK and TCP Retransmission If File transfere on port 20 starts, for every package it lasts precise 400 msec. for answer. If i change RTR register to 200 ms, it lasts 200 ms. (line 102 / 103 to 104: 0.4 sec.) I do not understand that ? Al of this is running perfect with old chipset W3100 Can you please give me any idea ? Many Thanks, Best regards: Alfred.

alfred · Answer

Hi Eugeny, thank you very much !! I will try that at once and tell you result ! Best regards: Alfred.