Cisco Catalyst 4507 IOS Recovery

Looking for a Valid Image in Flash:

Follow the instructions provided below:

1. Issue the dev command to see which devices are available on your router:
   

   rommon 1 > dev 
   Devices in device table:
           id  name 
       flash:  flash 
   bootflash:  boot flash 
       eprom:  eprom
   rommon 2 > 

2. Issue the dir flash: command, and then look for a valid Cisco IOS® software image:
   

   rommon 3 > dir flash:
            File size              Checksum   File name
         8052512 bytes (0x7adf20)   0xc7b6    c4500-js-mz.121-6
   rommon 4 >  
   

   You can also use the dir bootflash:command to examine the bootflash for a valid boot image.
3. Try to boot from that image. If the file is valid, this brings you back to normal operation mode:
   

   rommon 5 > boot flash:c4500-js-mz.121-6
   program load complete, entry point: 0x80008000, size: 0x7ade04
   Self decompressing the image : #####################################      
   ####################################################################      
   ####... 

4. If none of the files are valid, you need to download a new one. There is only one way to install an image on the Cisco 4500 and 4700 Series Routers if the main Cisco IOS software has been deleted or corrupted: use the router's boot image.