Restoring IOS from ROMmon Mode Using Xmodem


The output that follows was taken from a 1720 router. Some of this output might vary from yours, depending on the router model that you are using.

rommon 1 >confreg

Shows configuration summary. Step through the questions, answering defaults until you can change the console baud rate. Change it to 115200; makes transfer go faster

     Configuration Summary enabled are: load rom after netboot fails console baud: 9600 boot: image specified by the boot system commands          or default to: cisco2-c1700 

 

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 [0]: 7 change the boot characteristics? y/n [n]: n 

Prompts will begin to ask a series of questions that will allow you to change the config-register. Answer n to all questions except the one that asks you to change the console baud rate. For the enter rate, choose 7 because that is the number that represents a baud rate of 115200

     Configuration Summary enabled are: load rom after netboot fails console baud: 115200 boot: image specified by the boot system commands          or default to: cisco2-c1700 do you wish to change the configuration? y/n [n]: n rommon2> 

After the summary is shown again, choose n to not change the configuration and go to the rommon> prompt again

  

rommon 2>reset

Reloads router at new com speed. Change HyperTerminal setting to 115200 to match the router's new console setting

  
  

Rommon 1>xmodem c1700-js-l_121-3.bin

Asking to transfer this image using Xmodem

...<output cut>...

 

Do you wish to continue? y/n [n ]:y

Choose y to continue

  
  
 

In HyperTerminal, go to Transfer, then Send File (see Figure 16-1). Locate the IOS file on the hard drive and click Send (see Figure 16-2)

Router will reload when transfer is completed

 
  

Reset baud rate on router

 
  

Router(config)#line con 0

 

Router(config-line)#speed 9600

 

Router(config-line)#exit

HyperTerminal will stop responding. Reconnect to the router using 9600 baud, 8-N-1


Figure 16-1. Finding the IOS Image File


Figure 16-2. Sending the IOS Image File to the Router





CCNA Self-Study(c) CCNA Portable Command Guide
CCNA Portable Command Guide
ISBN: 1587201585
EAN: 2147483647
Year: 2006
Pages: 261
Authors: Scott Empson

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