Question : Cisco 3620 Router

Hi I am trying to install an IOS onto a 3620 Router and get the following msg.  I dont have a PCMCIA Card to install the IOS onto.  It is installed directly into the internal Flash memory.  I try uploading the file via a console cable using xmodem and get the below error msg.  I cant seem to go past rommon mode.  I need a way to delete the existing image in flash.  HELP?

ERR: Image Size Exceeds free flash space

The below msg I get when I boot up the router.

C3600 Processor with 32768 Kbytes of main memory.
Main memory is configured to 32bit mode with parity disabled.

loadprog:      bad file magic number:            0x0
boot:            cannot load "flash:"

Answer : Cisco 3620 Router

Try this

Xmodem Procedure for Downloading a Cisco IOS Software Image onto a Cisco 3600 Router
Use the following xmodem procedure to download a Cisco IOS software image onto a Cisco 3600 Series Router.

The standard procedure uses the default console speed of 9600 bits per second. Xmodem is a slow transfer protocol, and the transfer of a file as large as a Cisco IOS software image could take an unacceptably long time. Increasing the console speed on the 3600 router helps decrease the time it takes to do the xmodem file transfer.

When in ROMMON mode, follow the procedure below using the ROMMON confreg utility.

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
Open a new hyperterminal with settings as follows:

Bits per second - 115200
Data bits - 8
Parity - None
Stop bits - 1
Flow control - Hardware After setting the hyperterminal, you get a rommon prompt. Enter the xmodem command. Before typing 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 ...

After the above message appears, you have to download the file using xmodem and the following procedure:

Go to Hyperterminal and click the Transfer menu

Select Send File

In the dialog box which appears, click on browse; look for the file name on your local hard drive

Below the filename field is the Protocol drop-down box; select Xmodem

Click Send to initiate the file transfer

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
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