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:
1 | Autoboot: failed, BOOT string is empty |
Then first check the boot flash on the supervisor:
1 | rommon 1 > dir bootflash: |
You will most likely see something along the lines of :
1 2 | 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:
1 | rommon 1 > dir disk0: |
1 2 3 4 | 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:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | 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:
1 | 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:
1 | boot system flash disk0:s720333-psv-mz.122-18.SXD7.bin |
Cisco’s link is here.
Does this mean you’re having a bad day at the new data center?
Nah. When you wipe the configs off of a large chassis…which you almost never do, save for new installs, you need this little tidbit of information. 🙂 I put it here in the hopes that it will force me to remember all of the information.
This just saved my Bacon. Awesome blog. Thanks Greg.
@David
Good deal…I hear there is going to be a bacon shortage next year 😉