topic Re: Catalyst 9800 rommon mode in Wireless

Catalyst 9800 rommon mode

nstr1 — Mon, 05 Jul 2021 20:24:34 GMT

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??

Re: Catalyst 9800 rommon mode

nstr1 — Thu, 18 Mar 2021 06:44:22 GMT

When my 9800 starts it shows this;

Initializing Hardware ...

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 ...

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

Re: Catalyst 9800 rommon mode

balaji.bandi — Thu, 18 Mar 2021 07:38:10 GMT

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

Re: Catalyst 9800 rommon mode

Scott Fella — Thu, 18 Mar 2021 07:52:31 GMT

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

Re: Catalyst 9800 rommon mode

Leo Laohoo — Thu, 18 Mar 2021 10:39:14 GMT

Post the complete output to the following commands:

dir flash:
set

Re: Catalyst 9800 rommon mode

nstr1 — Thu, 18 Mar 2021 14:57:38 GMT

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 ...

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

Initializing Hardware ...

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>

Re: Catalyst 9800 rommon mode

balaji.bandi — Thu, 18 Mar 2021 15:39:19 GMT

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

Re: Catalyst 9800 rommon mode

nstr1 — Thu, 18 Mar 2021 15:49:35 GMT

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

Re: Catalyst 9800 rommon mode

balaji.bandi — Thu, 18 Mar 2021 16:41:51 GMT

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

Re: Catalyst 9800 rommon mode

Rich R — Fri, 19 Mar 2021 14:35:51 GMT

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.

Re: Catalyst 9800 rommon mode

Leo Laohoo — Mon, 22 Mar 2021 01:25:39 GMT

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

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

Re: Catalyst 9800 rommon mode

Leo Laohoo — Mon, 22 Mar 2021 02:06:24 GMT

@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".

Re: Catalyst 9800 rommon mode

nstr1 — Mon, 22 Mar 2021 04:22:25 GMT

My usb is 1.0 and it is only 4gb

Re: Catalyst 9800 rommon mode

Rich R — Mon, 22 Mar 2021 09:14:36 GMT

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.

Re: Catalyst 9800 rommon mode

balaji.bandi — Mon, 22 Mar 2021 14:27:48 GMT

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

Re: Catalyst 9800 rommon mode

nstr1 — Fri, 16 Apr 2021 05:45:21 GMT

I used another USB and had no problems.

Now my WLC is working without problems