cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Announcements

Ask the Expert- SD-WAN

538
Views
0
Helpful
9
Replies
Beginner

4331 upgrade issue.

Hi to all,

I've tried to upgrade my 4331 router and in process deleted old image.

Now it doesn't boot up and always goes to 'rommon' mode.

Can anybody help me with this case?

Everyone's tags (2)
1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Community Legend

Re: 4331 upgrade issue.


@asmlicense wrote:
Unknown image structure
boot: cannot determine first file name on device "bootflash:/"
autoboot: boot failed, restarting...

There is no valid IOS file to boot.  Someone has erased the flash.  

The fastest way to get the router to boot the IOS is to use a USB flash drive.  

The command to boot an IOS from ROMmon is "boot usb0:IOS_filename.bin".

9 REPLIES 9
Participant

Re: 4331 upgrade issue.

Are you able to see the new image in bootflash by using the dir (or dir bootflash) command? 

 

Once you confirm it exists on the router you should be able to use the boot command to load the new image version.

 

If you are able to get this far you will then probably have to set the boot image in the actual configuration something like this:

 

boot system flash bootflash:<image name>

  

 

 

Beginner

Re: 4331 upgrade issue.

Dear Ben,

we tested ios, but it didn't boot, so after this we deleted old image to test again and the router didn't boot after this. It's only goes to rommon. So there is no old image and the new image doesn't work.

Is there any way to upload new image to router?

Hall of Fame Community Legend

Re: 4331 upgrade issue.

Console into the router and reboot.
We want to see what the router is doing.
Highlighted
Beginner

Re: 4331 upgrade issue.

Here is log from router.

Everyone's tags (1)
Hall of Fame Community Legend

Re: 4331 upgrade issue.


@asmlicense wrote:
Unknown image structure
boot: cannot determine first file name on device "bootflash:/"
autoboot: boot failed, restarting...

There is no valid IOS file to boot.  Someone has erased the flash.  

The fastest way to get the router to boot the IOS is to use a USB flash drive.  

The command to boot an IOS from ROMmon is "boot usb0:IOS_filename.bin".

Beginner

Re: 4331 upgrade issue.

Thank you very much!

Hall of Fame Community Legend

Re: 4331 upgrade issue.

Did it work?
Beginner

Re: 4331 upgrade issue.

Yes it did. Thank you again.
Hall of Fame Community Legend

Re: 4331 upgrade issue.

Good. Happy to hear it is finally working.
CreatePlease to create content
Content for Community-Ad
July's Community Spotlight Awards