topic Re: CIMC Malfunction (DNAC) in Software-Defined Access (SD-Access)

CIMC Malfunction (DNAC)

JB22 — Thu, 15 Jan 2026 14:17:40 GMT

Hello, I am trying to connect to cimc via https. The user/pass combination works perfectly with ssh. I get this error message via the web GUI. There is definitely power! ssh is running at the same time. Thanks

🙂

"The server does not seem to be responding. Please make sure that the power supply is connected / present and that the Cisco IMC IP address is correct. OK "

show bios
BIOS Version Boot Order
--------------------------------------------- ----------------------------
C220M4.3.0.3c.0.0831170216 (none)

show cimc
Firmware Version Current Time Local Time
-------------------- ------------------------ ------------------------------
3.0(3f)

Re: CIMC Malfunction (DNAC)

Andrii Oliinyk — Thu, 15 Jan 2026 14:55:17 GMT

FW in the middle is blocking HTTPs?
or disabled HTTPS access on the CIMC (Admin > Communication Services or Network > Services depending on firmware version)?

Re: CIMC Malfunction (DNAC)

JB22 — Thu, 15 Jan 2026 14:57:27 GMT

Thanks for your answer! 🙂

No FW inside.

https is on (portscan and Website is running). ... As long as i do not access cimc i can not change it. But it is available.

Re: CIMC Malfunction (DNAC)

Andrii Oliinyk — Thu, 15 Jan 2026 15:15:34 GMT

https of cimc & dnac ui are different things
check with cimc cli
Server# scope cimc
Server /cimc # scope http

Re: CIMC Malfunction (DNAC)

JB22 — Fri, 16 Jan 2026 07:33:56 GMT

Hi 🙂

I know. I’m trying to access the CIMC. Both services (DNAC and CIMC) are definitely running. The error message is incorrect.

Re: CIMC Malfunction (DNAC)

JB22 — Fri, 16 Jan 2026 07:51:49 GMT

There is no option "http" or "https"...

/cimc # scope
adapter-secure-update enable/disable/show adapter security version check
firmware Cisco IMC firmware management
import-export Import or export Cisco IMC configuration
log Cisco IMC trace log/syslog
network Cisco IMC Networking Management
power-restore-policy Power Restore Policy parameters
remote-management Cisco IMC Remote Management
tech-support Gather and upload technical support information

Re: CIMC Malfunction (DNAC)

JB22 — Fri, 16 Jan 2026 07:54:43 GMT

II performed a factory default reset of the CIMC. This definitely worked, without any doubt. However, the situation afterward is exactly the same as before, including the identical error message.

I would like update the cimc firmware by using ssh. Any ideas where to get the actual firmware?

Re: CIMC Malfunction (DNAC)

JB22 — Fri, 16 Jan 2026 08:03:35 GMT

show bios detail
BIOS:
BIOS Version: C220M4.3.0.3c.0.0831170216
Backup BIOS Version: C220M4.3.0.3c.0.0831170216
Boot Order: (none)
FW Update/Recovery Status: None, OK
UEFI Secure Boot: disabled
Configured Boot Mode: None
Actual Boot Mode: Unknown
Last Configured Boot Order Source: UNKNOWN
One time boot device: (none)

show cimc detail
Cisco IMC:
Firmware Version: 3.0(3f)
Current Time: Fri Jan 16 08:01:21 2026
Boot-loader Version: 3.0(3f).36
Local Time: Fri Jan 16 08:01:21 2026 UTC +0000
Timezone: UTC
Reset Reason: graceful-reboot

Re: CIMC Malfunction (DNAC)

Cristian Matei — Mon, 19 Jan 2026 18:41:14 GMT

Hi,

You need a Cisco account with appropriate rights / support contract to download the firmware, latest recommended version for your gear being: https://software.cisco.com/download/home/286281345/type/283850974/release/4.1(2m)

Upgrade guide can be found here:

https://www.cisco.com/en/US/docs/unified_computing/ucs/c/sw/gui/config/guide/1.5/b_Cisco_UCS_C-series_GUI_Configuration_Guide.151_chapter_01101.html#task_F30C9D617C924B44B56E456A708EA32F

Good luck,

Cristian.