How to install Router image using TFTP server? ~ TechMyFriend.com

Friday, May 16, 2008

How to install Router image using TFTP server?

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day tip will help you to install the router IOS to a Cisco 2500/2600/2800/3800 series routers. First make sure, you have installed and configured any TFTP (Trivial File Transfer Protocol) server over the LAN port. If you are trying to boot up your router without an IOS, the nonworking router will boot up in ROMmom

mode and the router first prompt will look like this:

rommon>

First run the set command to verify the ROMmom default variables.

In this mode all commands are case sensitive.ommon1>set

   

  Now run the TFTP download command to start the restore image process then press the enter button. 

  
  rommon 2> tftpdnld 

  After running the
  tftpdnld command, the following information will appear as under:
  

  
  Now type the following information, for example router ip address, mask
  and default gateway then tftp server address. 

  
  rommon 3 >
  IP_ADDRESS=10.1.1.2                            (router ip address)

  
  rommon 4 >
  IP_SUBNET_MASK=255.0.0.0                 
  (default subnet mask)

  
  rommon 5 >
  DEFAULT_GATEWAY=10.1.1.2               
  (gateway address)

  
  rommon 6 >
  TFTP_SERVER=10.1.1.1                         
  (tftp server address)

  
  rommon 7 >
TFTP_FILE=12.0(4)t                                  (IOS file
name)                                                                                                                

  
  Now again run the tftpdnld command to start recovery process
  immediately. 

  
  rommon 8 > tftpdnld 

  
  IP_ADDRESS: 10.1.1.2

  
  IP_SUBNET_MASK:
  255.0.0.0

  
  DEFAULT_GATEWAY:
  10.1.1.2

  
  TFTP_SERVER: 10.1.1.1

  
  TFTP_FILE: 12.0(4)t 

  
  Invoke this command for
  disaster recovery only.

  
  WARNING: all existing
  data in all partitions on flash will be lost!

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

  
  Receiving 12.0(4)t from
  10.1.1.1 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  
  
  !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  
  
  !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  
  File reception
  completed.

  
  Copying file 12.0(4)t
  to flash.

  
  Erasing flash at
  0x60100000 

  
  Now run the reset command to restore router as factory default
  settings. 

  
  rommon 16 > reset 

  
  Now after some time, your router will boot up with factory default
  settings.