Catalyst 9800 rommon mode

[nstr1]

I have a problem with my Catalyst 9800 L-C.

My 9800 had some configurations then i decided erase that config with the command factory-reset all

Later my 9800 reboot but when my 9800 started i can see my 9800 in rommon mode.

i wastrying initializar with diferent commands but even the command Dir showed this;

rommon24>dir
Incorrect Usage

Also i was trying initializar from an USB but it was impossible;

rommon4>dir usb0:
File system not supported

Also i was tryaing to used this guide

https://www.routexp.com/2019/05/cisco-wireless-controller-password.html

but i could not initializar my 9800.

What happen with my 9800??

[nstr1]

When my 9800 starts it shows this;

Initializing Hardware ...

System Bootstrap, Version 16.12(3r), RELEASE SOFTWARE
Copyright (c) 1994-2019 by cisco Systems, Inc.

Current image running: Boot ROM0
Last reset cause: LocalSoft

The values of MSR 0x198h = 00001400 and MSR 0x199h = 00001400 for KATAR
C9800-L-X-K9 platform with 16777216 Kbytes of main memory

no valid BOOT image found
Final autoboot attempt from default boot device...
File system not supported
boot: cannot determine first file name on device "bootflash:"
autoboot: boot failed, restarting...

Initializing Hardware ...

System Bootstrap, Version 16.12(3r), RELEASE SOFTWARE
Copyright (c) 1994-2019 by cisco Systems, Inc.

Current image running: Boot ROM0
Last reset cause: LocalSoft

The values of MSR 0x198h = 00001400 and MSR 0x199h = 00001400 for KATAR
C9800-L-X-K9 platform with 16777216 Kbytes of main memory

rommon1

[balaji.bandi]

make sure USB formatted with  File System: FAT32   ( that is the best option is USB or you can try TFTP)

i prefer USB with 8GB  stick,

here is the guide :

https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/214012-recovering-a-catalyst-9800-controller-fr.html#anc6

[nstr1]

I was trying with that guide but was impossible.

Here the results;

rommon11>
rommon11>confreg 0x2142

You must reset or power cycle for new config to take effect
rommon12>sync
rommon13>reset

Resetting .......

Initializing Hardware ...

System Bootstrap, Version 16.12(3r), RELEASE SOFTWARE
Copyright (c) 1994-2019 by cisco Systems, Inc.

Current image running: Boot ROM0
Last reset cause: LocalSoft

The values of MSR 0x198h = 00001400 and MSR 0x199h = 00001400 for KATAR
C9800-L-X-K9 platform with 16777216 Kbytes of main memory

no valid BOOT image found
Final autoboot attempt from default boot device...
File system not supported
boot: cannot determine first file name on device "bootflash:"
autoboot: boot failed, restarting...

Initializing Hardware ...

System Bootstrap, Version 16.12(3r), RELEASE SOFTWARE
Copyright (c) 1994-2019 by cisco Systems, Inc.

Current image running: Boot ROM0
Last reset cause: LocalSoft

The values of MSR 0x198h = 00001400 and MSR 0x199h = 00001400 for KATAR
C9800-L-X-K9 platform with 16777216 Kbytes of main memory

rommon1>

[balaji.bandi]

boot: cannot determine first file name on device "bootflash:"

You need to boot from USB image.

make sure you follow the steps in the document,  dir usb0:  is the key to see if the files are there

[nstr1]

Yes i was trying too,

I connected my USB (my USB is FAT32) and show this;

rommon15>
rommon15>dir usb0:
File system not supported
rommon16>

Even i couldn´t execute only dir becaouse show this;

rommon24>dir
Incorrect Usage

[balaji.bandi]

is this USB 3.0 ?

Load image through USB

Step 1. Have a USB pen drive with the .bin file to be loaded to the 9800 controller (on 9800-80, due to CSCvn82287

, a USB 3.0 flash drive may not be recognized in ROMMON).

post  outout

dir bootflash:

then try TFTP method other option as per the URL i have provided

[Rich R]

I don't think that USB is FAT32.  Like @balaji.bandi said use a 8Gb USB drive and make sure it is *really* FAT32.  If it's larger then Windows tends to use exFAT by default but may still report it as FAT32.

https://www.geeksforgeeks.org/difference-fat32-exfat-ntfs-file-system/

Format it from a command prompt and specify the fileystem format to use.

/FS:filesystem Specifies the type of the file system (FAT, FAT32, exFAT,NTFS, UDF, ReFS).

Or use whichever tool or utility you prefer but make 100% sure it is really FAT32.

[Leo Laohoo]

What is the brand/make and the size of this USB stick? 

Cisco routers and switches will only support up to 16 Gb size.  

[nstr1]

My usb is 1.0 and it is only 4gb

[Rich R]

CSCvn82287 is irrelevant in this case anyway.  If it was that it would say "media drive usb0: not present" but it's not - it's saying "File system not supported" which is why I refer back to my previous reply on making sure it is actually FAT32?

Regarding bug descriptions - like Leo says they can be wildy inaccurate or misleading sometimes - we've asked for them to be updated with correct info a number of times.

So have you reformatted the drive definitely using FAT32?

Otherwise just use TFTP.

[balaji.bandi]

Try get another USB as suggest and try and let us know. or you can use TFTP to resolove quicker.

[Leo Laohoo]

---

@balaji.bandi wrote:

Step 1. Have a USB pen drive with the .bin file to be loaded to the 9800 controller (on 9800-80, due to CSCvn82287

---

This bug, CSCvn82287, should be made "private" because it is so inaccurate:  I have several Samsung- and Toshiba-branded USB 3.0 thumb drives (various Toshiba "models") and they work on IOS-XE in ROMMON flawlessly.   

And this is one example why I always take Bug IDs information with hesitation because they more-than-usual lack "accuracy".  

[Scott Fella]

Make sure that the conf reg is correct. Earlier versions were set wrong causing the 9800-L to boot into rommon
confreg 0x2142

[Leo Laohoo]

Post the complete output to the following commands: 

dir flash:
set