步骤：
1、在PC机上安装并运行TFTP server，TFTP server的地址就是PC机的IP地址，192.168.0.89/16（TFTP）
2、通过Console线配置路由器Fa0/0端口的IP地址，保证和PC机的IP在一个网段即可，192.168.0.100/16（Route）
3、验证PC机和路由器互相能ping通
设置路由器fa0/0端口IP地址
Router>enable
Router#conf t
Router(config)#int fa0/0
Router(config-if)#ip address 192.168.0.100 255.255.0.0
Router(config-if)#no shutdown
Ping PC机验证连通情况
Router#ping 192.168.0.89
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.0.89, timeout is 2 seconds:
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 1/1/4 ms
查看Flash的名称
Router#show version
....
System p_w_picpath file is "flash:c2600-i-mz.122.17a.bin"
....
备份Flash文件到TFTP server
Router#copy flash tftp
Source filename []? c2600-i-mz.122.17a.bin
Address or name of remote host []? 192.168.0.89
Destination filename [c2600-i-mz.122.17a.bin]?
备份NVRAM文件到TFTP server
r2600#copy startup-config tftp
Address or name of remote host []? 192.168.0.89
Destination filename [r2600-confg]? r2600-config
!!
399 bytes copied in 0.052 secs (7673 bytes/sec)