Core issue
The issue happens when the image size is greater than 33554432 bytes and the image transfer is done from the device to the TFTP server and vice-versa.
In some scenarios, you may also get the file too large for TFTP protocol error message while performing a file transfer.
This problem occurs due to a software bug which is identified in Cisco bug ID CSCee67733.
Resolution
The workaround is to follow either one of these two procedures:
- Use FTP server functionality instead of TFTP or you can use the TFTPD32 utility which is a third party utility.
- Upgrade to Cisco IOS® Software Release 12.2(17d)SXB07 or later which can be downloaded from the LAN Switching Software page.
For problems related to a software image transfer from a TFTP server failure or timeout, refer to the article Software image transfer from a TFTP server fails or timeout.
For additional information, refer to TFTP Server Selection and Use.
