topic Re: ICX7150-C12P Stuck on “Writing Shmoo values into flash” in RUCKUS Support for Lennar Homes

ICX7150-C12P Stuck on “Writing Shmoo values into flash”

Bstevenson — Tue, 01 Apr 2025 12:15:59 GMT

Hi, my ICX7150-C12P switch has failed and is stuck at boot showing “Writing Shmoo values into flash…” in the console output. I have tried all recommended recovery steps including power cycles, holding reset, TFTP recovery, and serial connection with no success. The unit never fully boots and remains stuck. I understand this is a known hardware failure.

Can you please assist me in getting an RMA or replacement? I have attached a photo of the console output and can provide serial number or any other info needed.

Thank you!

Re: ICX7150-C12P Stuck on “Writing Shmoo values into flash”

Bstevenson — Tue, 01 Apr 2025 12:18:53 GMT

Re: ICX7150-C12P Stuck on “Writing Shmoo values into flash”

Bstevenson — Tue, 01 Apr 2025 12:20:24 GMT

Re: ICX7150-C12P Stuck on “Writing Shmoo values into flash”

Imran_ruckus — Tue, 01 Apr 2025 12:40:14 GMT

Hi @Bstevenson

Greetings!!!

Thank you for reaching out to the RUCKUS Lennar Home Community.

We appreciate your patience and understanding as we work to resolve the issues you are experiencing with your RUCKUS setup.

Based on the information provided, it appears that your RUCKUS ICX-7150-C12P Switch is stuck in boot mode, and you are trying the Software Recovery process.

We apologize for any inconvenience this has caused and are committed to assisting you promptly.

Could you please try the Software Recovery process on a Windows Laptop/PC?

Additionally, please share a Picture showing the Software Recovery cable connections between the Switch and the laptop.

Thank you again for your patience and understanding.

Best regards,

Imran Sanadi

RUCKUS Lennar Home Community.

Re: ICX7150-C12P Stuck on “Writing Shmoo values into flash”

Bstevenson — Tue, 01 Apr 2025 13:25:16 GMT

My friend who is a network engineer tried on his windows pc for 5 hours the day before yesterday 😕

Re: ICX7150-C12P Stuck on “Writing Shmoo values into flash”

Bstevenson — Tue, 01 Apr 2025 13:27:33 GMT

Hi Imran! Thank you for the quick reply!! I also spent 9 hours attempting everything with ChatGPT and it ended up telling me after we exhausted all efforts that the unit is bricked and nothing can be done.

Re: ICX7150-C12P Stuck on “Writing Shmoo values into flash”

Imran_ruckus — Tue, 01 Apr 2025 13:50:47 GMT

Hi @Bstevenson

Thank you for the response and the update.

Could you please let me know what lights you see on the Switch currently, when plugged into a power outlet?

Please share a picture of the same.

Thank you again.

Best regards,

Imran Sanadi

RUCKUS Lennar Home Community.

Re: ICX7150-C12P Stuck on “Writing Shmoo values into flash”

Bstevenson — Tue, 01 Apr 2025 14:48:51 GMT

Hi Imran,

Thank you for your reply. Attached is a picture of the current status lights when the switch is plugged into power. The STAT, SYST, PWR, and Ethernet cable lights are on and green.

Please let me know the next steps.

Thank you!

Re: ICX7150-C12P Stuck on “Writing Shmoo values into flash”

Imran_ruckus — Tue, 01 Apr 2025 15:32:48 GMT

Hi @Bstevenson

Greetings!

Thank you for your response and update.

I have checked the status of your RUCKUS ICX-7150-C12P Switch from the picture you shared, and it appears to be in a normal state.

Please connect the Ethernet cables for your devices and the ISP router any of the 1–12 ports on the switch (refer to the screenshot below). Once connected, check if the devices start working properly.

Let me know if you need any further assistance. I appreciate your patience.

Best regards,
Imran Sanadi
RUCKUS Lennar Home Community

Re: ICX7150-C12P Stuck on “Writing Shmoo values into flash”

Bstevenson — Tue, 01 Apr 2025 16:02:43 GMT

Hi Imran,

Thank you for your response and for reviewing the pictures I shared.

Unfortunately, the issue is not related to physical connectivity. As I initially mentioned, the switch is stuck at the bootloader stage and never fully boots up. It freezes on the message:

“Writing Shmoo values into flash”

I have already spent several hours attempting to recover the device following the official recovery procedures, including:

Connecting via console with CoolTerm and screen sessions
Attempting boot interruption with the ‘b’ key and serial break commands
Multiple power cycles while holding the reset button
Trying to load firmware via USB and serial
Attempted recovery over Telnet and SSH, but the device is unreachable

The switch never progresses past the bootloader message and is in an unrecoverable state. This is not a configuration issue—it is a hardware failure.

The lights on the switch appear normal because the bootloader is active, but the operating system never boots.

This is a known issue with the ICX7150 series, and others have received RMA replacements when stuck at this exact point.

I kindly request that this case be escalated to the RMA team so I can proceed with a replacement, as no further troubleshooting will resolve this hardware fault.

Please let me know if you need any further information, but I’ve exhausted all recovery options.

Thank you for your assistance and understanding.

Best regards,
B

Re: ICX7150-C12P Stuck on “Writing Shmoo values into flash”

Imran_ruckus — Tue, 01 Apr 2025 16:08:49 GMT

Hi @Bstevenson

Thank you for your response and the information.

I am currently reviewing this internally and will get back to you shortly.

I appreciate your patience.

Best regards,
Imran Sanadi
RUCKUS Lennar Home Community

Re: ICX7150-C12P Stuck on “Writing Shmoo values into flash”

Bstevenson — Tue, 01 Apr 2025 18:33:22 GMT

Thank you!

Re: ICX7150-C12P Stuck on “Writing Shmoo values into flash”

Imran_ruckus — Tue, 01 Apr 2025 21:10:46 GMT

Hi @Bstevenson

I am still working on it internally and will get back to you shortly tomorrow.

I appreciate your patience.

Best regards,
Imran Sanadi
RUCKUS Lennar Home Community

Re: ICX7150-C12P Stuck on “Writing Shmoo values into flash”

Bstevenson — Wed, 02 Apr 2025 15:00:11 GMT

Great, thanks!

Re: ICX7150-C12P Stuck on “Writing Shmoo values into flash”

Bstevenson — Wed, 02 Apr 2025 19:58:56 GMT

Hi Imran, just checking in on this! Thank you!

Re: ICX7150-C12P Stuck on “Writing Shmoo values into flash”

Bstevenson — Thu, 03 Apr 2025 00:24:00 GMT

Hi, thanks for checking on this, just checking in on how today went?

thanks!

-B

Re: ICX7150-C12P Stuck on “Writing Shmoo values into flash”

Imran_ruckus — Thu, 03 Apr 2025 12:39:41 GMT

Hi @Bstevenson

Greetings of the day!!!

Thank you for sharing the requested information via PRIVATE CHAT.

Based on the troubleshooting conducted, it appears that your ICX-7150-C12P Switch is currently stuck during the booting process. These are some symptoms of a Switch kernel image failure. Tried multiple troubleshooting steps. However, it seems that the switch has a corrupted image that cannot be recovered, and the issue persists.

Given these circumstances, the switch will need to be processed for an RMA (Return Merchandise Authorization), which essentially means that it should be replaced.

Feel free to contact us via chat. Copy and share the link from the post (URL), and Switch serial number, paste it into the chat when prompted to start the unit replacement.

Please follow the steps as shown in the example below:

As shown in the below picture, copy the link and share it via chat from the link provided:

The below link is to contact us by chat (only)

https://support.ruckuswireless.com/contact-us

Did I answer your queries? If yes, hit the Kudos buttons and also accept the answers as Accepted solutions.

Please let me know if you have any queries in this regard.

Thank you again for your patience and understanding.

Best regards,

Imran Sanadi

RUCKUS Lennar Home Community.

Re: ICX7150-C12P Stuck on “Writing Shmoo values into flash”

Bstevenson — Thu, 03 Apr 2025 15:17:42 GMT

Imran,

Thanks so much for your effort in helping with this! Kudos!

-B

Re: ICX7150-C12P Stuck on “Writing Shmoo values into flash”

Imran_ruckus — Thu, 03 Apr 2025 15:40:15 GMT

Hi @Bstevenson

Thank you for the response.

We appreciate your time and patience on this case.

Thank you again for contacting RUCKUS Lennar Home Community and feel free to contact us for future queries.

Have a great day ahead!!!

Best regards,

Imran Sanadi

RUCKUS Lennar Home Community.