Cisco 7600 Or 6500 Boots To Rommon

If you boot straight to rommon on your 7600, with a message saying that it is unable to find boot file:

Autoboot: failed, BOOT string is empty

Then first check the boot flash on the supervisor:

rommon 1 > dir bootflash:

You will most likely see something along the lines of :

rommon 1 > dir bootflash:
         File size           Checksum   File name

Notice that nothing exists on the boot flash. This means you need to boot from an IOS that is installed on one of your disks. First list what is on your disk:

rommon 1 > dir disk0:

rommon 1 > dir disk0:

 File size           Checksum   File name
  45463592 bytes (0x104aecc)  0x9a2f0302    s720333-psv-mz.122-18.SXD7.bin

Using this info, boot via this file:

boot disk0:s720333-psv-mz.122-18.SXD7.bin

Loading image, please wait ...


Self decompressing the image : #################################################
################################################################################
################################################################################
################################################################################
####################### [OK]

              Restricted Rights Legend

Use, duplication, or disclosure by the Government is
subject to restrictions as set forth in subparagraph
(c) of the Commercial Computer Software - Restricted
Rights clause at FAR sec. 52.227-19 and subparagraph
(c) (1) (ii) of the Rights in Technical Data and Computer
Software clause at DFARS sec. 252.227-7013.
///ETC...

Once you get booted into the IOS, you can copy the disk image to the supervisor flash:

7609# copy disk0:s72033-psv-mz.122-18.SXD7.bin sup-bootflash:

If you are copying from the main supervisor over to the redundant supervisor just add the word slave in front of each disk device name.

You can also specify from IOS which image should be booted:

boot system flash disk0:s720333-psv-mz.122-18.SXD7.bin

Cisco’s link is here.