Use FTP Instead of TFTP to Transfer IOS Images

Michael Lucas' book Cisco Routers for the Desperate saved me this evening. I was trying to update the flash image on my Cisco 2950T-24 switch via TFTP, and had this problem (twice, actually):

gruden#copy tftp flash                 
Address or name of remote host [192.168.2.7]? 
Source filename [c2950-i6k2l2q4-mz.121-22.EA3.bin]? 
Destination filename [c2950-i6k2l2q4-mz.121-22.EA3.bin]? 
Accessing tftp://192.168.2.7/c2950-i6k2l2q4-mz.121-22.EA3.bin...
Loading c2950-i6k2l2q4-mz.121-22.EA3.bin from 192.168.2.7 (via Vlan1):
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
...edited...
!!!!!!!!!!!O!O!O!O!OO!OO!OO!OOOO
%Error reading tftp://192.168.2.7/c2950-i6k2l2q4-mz.121-22.EA3.bin (Transfer aborted)

Luckily the switch was not hosed at this point. I still had my command prompt and normal functionality. For some reason TFTP kept failing. The image stored on the TFTP server appeared good, since its MD5 hash matched that provided by Cisco. What to do?

I remember Michael Lucas describing how to use FTP to transfer IOS images, so I tried that:

gruden#copy ftp://richard:pasword@192.168.2.7/c2950-i6k2l2q4-mz.121-22.EA3.bin flash
Destination filename [c2950-i6k2l2q4-mz.121-22.EA3.bin]? 
Accessing ftp://richard:password@192.168.2.7/c2950-i6k2l2q4-mz.121-22.EA3.bin...
Loading c2950-i6k2l2q4-mz.121-22.EA3.bin !!!!!!!!!!!!!!!!!!!!!!!!!!!!!
...edited...
2867200 bytes copied in 256.536 secs (11177 bytes/sec)

I then reloaded the switch and it came up without any problems. Thanks Michael!