本文轉載自 胖鯊魚網絡 http://www.pangshayu.com/html/6010.html
關鍵字：思科交換機,CISCO2960,重灌IOS,重裝IOS,switch:
公司的一臺思科2960交換機拿來設置，在清空配置的時候不小心清空了Flash：結果reload啓動不起來，直接進入了"SWITCH：”模式。
然後就Boot啓動：
switch: boot
Loading "flash:c2960-lanbasek9-mz.122-44.SE6/c2960-lanbasek9-mz.122-44.SE6.bin".
..flash:c2960-lanbasek9-mz.122-44.SE6/c2960-lanbasek9-mz.122-44.SE6.bin: no such
file or directory
Error loading "flash:c2960-lanbasek9-mz.122-44.SE6/c2960-lanbasek9-mz.122-44.SE6
.bin"
Interrupt within 5 seconds to abort boot process.
Boot process failed...
結果如上，還是不行加載不上IOS，然後我就做了Reset動作：
switch: reset
Are you sure you want to reset the system (y/n)?y
System resetting...
Boot Sector Filesystem (bs) installed, fsid: 2
Base ethernet MAC Address: ac:a0:16:59:6e:00
Xmodem file system is available.
The password-recovery mechanism is enabled.
Initializing Flash...
flashfs[0]: 0 files, 1 directories
flashfs[0]: 0 orphaned files, 0 orphaned directories
flashfs[0]: Total bytes: 32514048
flashfs[0]: Bytes used: 1024
flashfs[0]: Bytes available: 32513024
flashfs[0]: flashfs fsck took 9 seconds.
...done Initializing Flash.
done.
Loading "flash:c2960-lanbasek9-mz.122-44.SE6/c2960-lanbasek9-mz.122-44.SE6.bin".
..flash:c2960-lanbasek9-mz.122-44.SE6/c2960-lanbasek9-mz.122-44.SE6.bin: no such
file or directory
Error loading "flash:c2960-lanbasek9-mz.122-44.SE6/c2960-lanbasek9-mz.122-44.SE6
.bin"
Interrupt within 5 seconds to abort boot process.
Boot process failed...
The system is unable to boot automatically. The BOOT
environment variable needs to be set to a bootable
p_w_picpath.
錯誤提示是"Error loading "flash:c2960-lanbasek9-mz.122-44.SE6/c2960-lanbasek9-mz.122-44.SE6
.bin"。加載不上c2960的IOS文件。爲了確認Flash中是否真的沒有IOS文件，我加載flash查看：
switch: flash_init
Initializing Flash...
...The flash is already initialized.
switch: dir flash:
Directory of flash:/
32513024 bytes available (1024 bytes used)
switch:
結果還真的什麼也沒有，My God！真的是給清空了，好吧，只有重灌了。在網上Downloa IOS文件：c2960-lanbasek9-mz.122-44.SE6.bin，或者去CISO官網Download最新的IOS。
下載好後準備Cisco TFTP軟件，準備重灌。要在SWITCH模式下用Xmodem方式灌纔可以。方法如下：
1.用C**ole控制檯連接交換機(這是必須的，已經在連接了)。
2.打開TFTP服務。
3.在超級終端裏輸入：
switch:copy xmodem：flash：c2960-lanbasek9-mz.122-44.SE6.bin
Begin the Xmodem or Xmodem-1K transfer now...
CCCCC
此時會出現CCCCCC字符，說明正在傳送文件。
4.還要在超級終端菜單的"傳送-->發送文件"，在協力選項中選擇Xmodem或着Xmodem-1K協議，然後選擇IOS的相應文件(就是剛纔輸入的c2960-lanbasek9-mz.122-44.SE6.bin)，開始正式傳送。
選擇Xmodem協議傳送，有時會傳送失敗，Xmodem協議不行就選擇1K Xmodem協議。我就是用1K Xmodem協議傳送成功的。傳送過程會很長，要1-2個小時，看文件大小，要慢慢等。等傳送進度條跑完，會出現一下界面和提示：8888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
File “xmodem:” successfully copied to "flash:c2960-lanbasek9-mz.122-44.SE6.bin"
switch: