Cisco 刪除IOS後恢複、重灌ios

Flash 被清空，只能進入rommon 模式，唯一辦法重灌IOS鏡像檔案，所需IOS檔案可以到cisco官方網站和www.net130.com下載：
    軟體準備：
* 先找到與機型相配的IOS檔案（注意機子的記憶體大小選擇大小相配的檔案）；
* 去下個Cisco TFTP Server；
   硬體準備：
* 除了要一根控制線外，還要一根交叉線來串連Router和你的控制電腦（注意Cisco Router一般規定了灌IOS必須用interface ethernet0/0，即第一個網路連接埠）；
   注意事項：
* 你要灌的IOS檔案要放到Cisco TFTP Server的根目錄下，Cisco TFTP Server才會自動找到你所需要載入的IOS鏡像檔案；

通過concle口登入路由器，設定tftp的環境

rommon 1 >IP_ADDRESS=192.168.1.2                 //預設為路由器第一個乙太網路介面的ip

rommon 2 >IP_SUBNET_MASK=255.255.255.0    //設定路由器乙太網路介面的子網路遮罩

rommon 3 >DEFAULT_GATEWAY=192.168.1.1    //設定網關，否則tftp無法成功

rommon 4 >TFTP_SERVER=192.168.1.104           //設定筆記本ip，即為tftp server的ip

rommon 5 >TFTP_FILE=c2600-i-mz.123-6c.bin     //設定路由器要下載的ios檔案名稱

rommon 6 > set                               //設定tftp完環境後，可以用set命令再檢查一下，也可以略過

PS1=rommon ! >

RET_2_RTS=

IP_ADDRESS=192.168.1.2

IP_SUBNET_MASK=255.255.255.0

DEFAULT_GATEWAY=192.168.1.1

TFTP_SERVER=192.168.1.104

TFTP_FILE=c2600-i-mz.123-6c.bin

rommon 7 > tftpdnld                      //核對無誤後，開始tftp

          IP_ADDRESS: 192.168.1.2
      IP_SUBNET_MASK: 255.255.255.0
     DEFAULT_GATEWAY: 192.168.1.1
         TFTP_SERVER: 192.168.1.104
           TFTP_FILE:c2600-i-mz.123-6c.bin

Invoke this command for disaster recovery only.
WARNING: all existing # in all partitions on flash will be lost!
Do you wish to continue? y/n: [n]: y

Receiving c2600-c-mz.121-9.bin from 192.168.1.104

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
File reception completed.
Copying file c2600-c-mz.121-9.bin to flash.
Erasing flash at 0x607c0000
program flash location 0x60120000

rommon 8 > confreg                   //下載ios完畢後，還需設定寄存器的值

      Configuration Summary
enabled are:
load rom after netboot fails
console baud: 9600
boot: image specified by the boot system commands
      or default to: cisco2-C2600

do you wish to change the configuration? y/n [n]: y      //要選擇“y”
enable "diagnostic mode"? y/n [n]: n
enable "use net in IP bcast address"? y/n [n]: n
disable "load rom after netboot fails"? y/n [n]: n
enable "use all zero broadcast"? y/n [n]: n
enable "break/abort has effect"? y/n [n]: n
enable "ignore system config info"? y/n [n]: n
change console baud rate? y/n [n]: n
change the boot characteristics? y/n [n]: y      //要選擇“y”
enter to boot:
0 = ROM Monitor
1 = the boot helper image
2-15 = boot system
    [2]:2                           //要選擇“2”

    Configuration Summary
enabled are:
load rom after netboot fails
console baud: 9600
boot: image specified by the boot system commands
      or default to: cisco2-C2600

do you wish to change the configuration? y/n [n]:n

rommon 8 > reset                       //重啟路由器

重啟後，恢複正常

 

如果不能確定ios版本，可在路由器重啟之前，按ctrl+break進入rommon後，輸入reset命令，可以看到當前路由器需要ios的版本檔案

本文來自CSDN部落格，轉載請標明出處：http://blog.csdn.net/yangfree990/archive/2010/06/10/5661937.aspx