[Tutorial] Load IOS Router 3600 series XMODEM

 

When in ROMMON mode, complete this procedure using the ROMMON confreg utility.

1. rommon 2 > confreg
   do you wish to change the configuration? y/n [n]:  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]:  y
   enter rate: 0 = 9600,  1 = 4800,  2 = 1200,  3 = 2400
               4 = 19200, 5 = 38400, 6 = 57600, 7 = 115200  [7]:  7
   change the boot characteristics? y/n  [n]:  y
   enter to boot:
    0 = ROM Monitor
    1 = the boot helper image
    2-15 = boot system
       [0]:  0
   
       Configuration Summary
   
   enabled are:
   load rom after netboot fails
   console baud: 115200
   boot: the ROM Monitor
   do you wish to change the configuration? y/n  [n]: n
   You must reset or power cycle for new config to take effect
   rommom 2 > reset
   

2. Open a new hyperterminal with these settings:
   

   Bits per second - 115200 
   Data bits - 8 
   Parity - None 
   Stop bits - 1 
   Flow control - Hardware

3. After setting the hyperterminal, you receive a rommon prompt. Enter the xmodem command. Before you enter an xmodem command, there should be a software image residing in your terminal or your local hard drive.
   

   rommon 2 > xmodem -c c3640-i-mz.121-7.bin
   
   Do not start the sending program yet... 
            File size           Checksum   File name
   
      4936800 bytes (0x4b5460)   0x2dd7    c3640-i-mz.121-7.bin (bad checksum: 0x13eb)
   
   WARNING: All existing data in flash will be lost!
   
   Invoke this application only for disaster recovery.
   
   Do you wish to continue? y/n  [n]:  y
   
   Ready to receive file c3640-i-mz.121-7.bin ...

4. After this message appears, you have to download the file using xmodem and this procedure:
   
   1. Go to Hyperterminal and click the Transfer menu.
   2. Select Send File.
   3. In the dialog box which appears, click on browse and look for the file name on your local hard drive.
   4. Under the filename field is the Protocol drop-down box. Choose Xmodem.
   5. Click Send to initiate the file transfer.
5. After the transfer completes, the router will reload itself. When the reload completes, press the return key to be taken to a prompt and to reset the configuration register and the console line speed.
   

   Router> enable
   Router#configure terminal
   Enter configuration commands, one per line.  End with CNTL/Z.
   Router(config)#configure terminal
   Router(config)#config-register 0x2102
   Router(config)#line con 0
   Router(config-line)# speed 9600
   

6. Upon changing the console speed, you will lose connectivity. Go to your terminal program, change the baud rate to 9600, and reconnect to the router console.
   

   Router(config-line)#ctrl z
   Router #write mem
   Router #reload