On Thu, Jan 17, 2013 at 8:29 AM, David Aldrich <[email protected]>wrote:
> I would like to give some more information about my problem. u-boot's > tftp transfers do eventually complete and the evm boots. I can then > execute tftp get commands from Linux on the evm and these execute quickly. > So the problem definitely has to do with the way u-boot uses tftp. > I have experienced similar issues. It seems that once U-Boot's TFTP client has trouble with one packet that it tends to have a lot more trouble thereafter. For example, if the file I try to TFTP doesn't exist when I start the transfer, it retries until the file does exist at which time it starts the transfer (so far, so good), but the file transfer is then very slow. If I press CTRL-C to stop it then start it again, it runs quickly. I have also had problems using TFTP from U-Boot through Ethernet hubs that seem to work well for everything else. Replacing the hubs with switches solved the problem in multiple cases. I haven't tried to capture the packets and troubleshoot it, but it seems like there is something non-optimal in the timing. Steve -- Steve Strobel Link Communications, Inc. 1035 Cerise Rd Billings, MT 59101-7378 (406) 245-5002 ext 102 (406) 245-4889 (fax) WWW: http://www.link-comm.com MailTo:[email protected]
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