Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Urgent help needed - unable to boot!

I recently upgraded my IOS (3750), and everything was fine. Now though when I try to boot I get the following:

Base ethernet MAC Address:

Xmodem file system is available.

The password-recovery mechanism is enabled.

Initializing Flash...

flashfs[0]: 3 files, 1 directories

flashfs[0]: 0 orphaned files, 0 orphaned directories

flashfs[0]: Total bytes: 15998976

flashfs[0]: Bytes used: 6656

flashfs[0]: Bytes available: 15992320

flashfs[0]: flashfs fsck took 8 seconds.

...done Initializing Flash.

Boot Sector Filesystem (bs) installed, fsid: 3


Loading "flash:c3750-ipbase-mz.122-25.SEE3.bin"...flash:c3750-ipbase-mz.122-25.S

EE3.bin: magic number mismatch: bad mzip file

Error loading "flash:c3750-ipbase-mz.122-25.SEE3.bin"

Interrupt within 5 seconds to abort boot process.

Boot process failed...

The system is unable to boot automatically. The BOOT

environment variable needs to be set to a bootable


I guess it's can I get another image from tftp? The commands available now are very few.

Please help!

Thanks, J


Re: Urgent help needed - unable to boot!


Issue a break while trying to boot. Once you are in rommon check flash to get exact filename that is in there. Try boot flash:filename.

If this doesn't work, I am afraid you are stuck with an xmodem recover over the console port. Unfortunately this is a bit of a nightmare, as you are stuck with 9.6k a second transfer. For details on xmodem please see the attached link

Hope this helps


New Member

Re: Urgent help needed - unable to boot!

Hi Martin,

Thanks very much for your response, much appreciated.

I am now doing an xmodem transfer.



New Member

Re: Urgent help needed - unable to boot!

It worked! Thank you, J

Re: Urgent help needed - unable to boot!

No worries. Did it just finish? They usually take this long.

CreatePlease to create content