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I did a couple of captures (hex ascii at bottom of files) with a running TFTP server, one from an OpenBSD TFTP client, and one from Redboot. Both were accessing Windows TFTPD32 for download. What I noticed was that the Redboot requests OCTET transfers, and adds another 500 bytes or so of 0's to the end of the transfer. Perhaps that's why windows TFTP servers don't work well with redboot... -----Original Message----- From: ecos-discuss-owner@sources.redhat.com [mailto:ecos-discuss-owner@sources.redhat.com] On Behalf Of Douglas Bush Sent: Wednesday, February 13, 2002 1:58 PM To: eCos Discussion List Subject: [ECOS] Problem TFTPing from redboot Folks, I can't seem to TFTP load an image into an EDB7211. I'm using Windows 2000, and the redboot which is already installed on my target is the standard (canned) redboot from May 2001. I start up my server application, then type; load -h 172.16.1.15 -m tftp redboot.srec The on target redboot responds with; Can't load 'redboot.srec': operation timed out I've tried 2 3Com tftp servers, and TFTPD32. I've also tried to increase the timeouts on the servers. Ethereal shows what appears to be a valid TFTP request, but its not being accepted by any of the TFTP servers. TFTPD32 said "Error: RecvFrom returns 10040: <A message sent on a datagram was larger than the internal message buffer or some other network limit, or the buffer used to receive a datagram into was smaller than the datagram itself." I suspected my windows MTU size so I tried pinging with 1472 byte packets with no fragmentation and that worked just fine. Does anyone have any experience with this? Also... What is everyone else using for a TFTP server for either cygwin or Windows 2000? Douglas Bush Extreme Engineering #17, 6025 - 12 St. SE Calgary, Alberta, Canada T2H 2K1 Phone: 403 640 9494 ext-208 Fax: 403 640 9599 http://www.extremeeng.com -- Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos and search the list archive: http://sources.redhat.com/ml/ecos-discuss
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REDBOOT_TFTP.txt
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OPENBSD_TFTP.txt
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