I am trying to copy a file on to the flash of a router over the WAN using TFTP. After some time it gets timed out. Even if I try to copy the file using the windows command over the WAN using TFTP it does not complete. Is it that TFTP does not support large file downloads over the WAN?
If I do a debug on the router, i get replies only till the 3rd or 4th block of data. Then, only the requests are send. I used two different TFTP servers suspecting an issue with TFTP. The router was Cisco 1841 and the link 512Kbps. The IOS file size 22MB.