1, install the Cisco TFTP Server Software (file name Tftpserver1-1-980730.exe) on Windows * System computer;
2, with WinZip software c2500-i-l.113-6.zip file for decompression, the extracted file name is C2500-i-l.113-6.bin, the file is copied into the hard disk-----subdirectories, such as D:\cisco.
3, start Cisco TFTP Server Software;
4, select "View"-"options" on the TFTP Server software interface, select "Browse" on the options interface, on the "TFTP Server root" option, Point the directory to the directory where the C2500-i-l.113-6.bin file is located, such as D:\cisco or other.
5, into the router to upgrade, the Ethernet address configured to install the TFTP software on the same network segment, and can ping the computer (in fact, it can not be the same network segment, as long as can be guaranteed ping).
6, in the router's privileged state (e.g. under router#), type copy TFTP flash
System prompt: Address or name of remote host [], type the machine IP addresses of the TFTP software.
System prompt: Source filename []? Type the name of the iOS software to be upgraded, in the case of c2500-i-l (here is the letter L, not the number 1). 11 (These are the numbers 1, not the letter L) 3-6.bin (note. Bin cannot be lost).
System prompts destination filename []?, direct carriage return, which indicates the same as the source filename.
There are other questions to follow, as prompted * can (if you are also prompted to delete previous iOS files, as well as confirmation messages, etc.).
The upgrade process completes while waiting for the system prompt to complete.
The whole process is about 2-3 minutes.
7, reboot.
Note that in the upgrade process, you must not power off or cause the router and TFTP server network is not smooth and so on!
This article from the "Operation and maintenance work Struggle" blog, please be sure to retain this source http://yanghuawu.blog.51cto.com/2638960/801243