加载新的IOS镜像 升级当前的IOS

　　Router1#copy tftp://172.25.1.1/c2600-ik9o3s-mz.122-12a.bin flash:

　　Destination filename [c2600-ik9o3s-mz.122-12a.bin]?

　　Accessing tftp://172.25.1.1/c2600-ik9o3s-mz.122-12a.bin...

　　Erase flash: before copying? [confirm]

　　Erasing the flash filesystem will remove all files! Continue? [confirm]

　　Erasing device... eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee ...erased

　　Erase of flash: complete

　　Loading c2600-ik9o3s-mz.122-12a.bin from 172.25.1.1 (via FastEthernet0/0.1):!!!!!!!!!!!!!!

　　[OK - 11135588 bytes]

　　Verifying checksum... OK (0xE643)

　　11135588 bytes copied in 82.236 secs (135410 bytes/sec)

　　Router1# reload

　　Proceed with reload? [confirm]