[U-Boot-Users] TFTP times out?

[André Berggren]

Hi!

We have the same problem with one minor difference. U-boot get the first part of a file and then starts getting timeouts (TTTT).
We used a Etheral to sniff and found out that u-boot ack one datapackage but when the next datapackage araives u-boot doesn´t seem to hear it. Instead u-boot timesout listening and sends another ack on the previous datapackage. The tftp server then retransmits the last datapackage again witch u-boot doesn´t hear, u-boot times out and send another ack on the previous datapackage, and we are stuck in this loop.
We use a Moxa ED6008 switch where we attached the sniffer for the recording.

See appended ethereal capture-file. Mark one UDP-package and use Analyse->decode as and chose tftp to make it more readable.

//André


-----Original Message-----
From: u-boot-users-admin at lists.sourceforge.net on behalf of Wolfgang Denk
Sent: Thu 11/10/2005 9:42 AM
To: Zhen Wang
Cc: Bharathi Subramanian; u-boot-users at lists.sourceforge.net
Subject: Re: Re : [U-Boot-Users] TFTP times out? 
 
In message <4372E4BF.8020401 at gmail.com> you wrote:
>
>    In a word, I think I should revise the tftpboot relevant codes to 
> prolong the time before time out. But I don't the exact file(location).

No. This will NOT solve the problem.

Run a network sniffer to find  out  if  U-Boot  is  actually  sending
packets,  and  the  TFTP server fails to reply, or if U-Boot does not
send any packets at all.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
365 Days of drinking Lo-Cal beer.                       = 1 Lite-year


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