[U-Boot-Users] TFTP block size is too high
Jared Holzman wrote:
Does anyone else have problems with the new default tftp block size of 1468 (set in tftp.c) being too large? I was getting corruption of the d/led images until I dropped it down to 1200. I'm afraid I don't have time to determine the real maximum size before corruption occurs. Does someone else want to look into this?
What exactly is your set-up i.e. what version of U-Boot, architecture, platform etc. are you running? I recall problems with MPC5121e that sound familiar, which were caused by a bug/misconfiguration in the FEC driver, but in this case we fixed the issue a couple of months ago. Maybe that's something of that sort..
kind regards, Rafal
Hi Jared,
On Wed, Apr 23, 2008 at 6:06 PM, Jared Holzman j.holzman@genesysdesign.com.au wrote:
Does anyone else have problems with the new default tftp block size of 1468 (set in tftp.c) being too large? I was getting corruption of the d/led images until I dropped it down to 1200. I'm afraid I don't have time to determine the real maximum size before corruption occurs. Does someone else want to look into this?
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The block size of 1468 assumes that your network can handle an MTU size of 1500 bytes, which most can by default. Is there a chance that somebody's using PPPoE or VPN software or something like that that would require a reduction of MTU size?
If I were you, the next thing I'd do would be to sniff the transactions using Wireshark. It's a fantastic tool that will quickly help you decide where to focus your efforts.
regards, Ben
participants (3)
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Ben Warren -
Jared Holzman -
Rafal Jaworowski