The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
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From the Navigation Pane, select . |
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You can view the following properties:
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The CPU is a central component of the system responsible for executing all computational tasks. The BMC monitors aspects of the CPU such as temperature and power consumption to ensure operation within normal ranges. This helps prevent overheating and hardware failures, ensuring system stability and reliability. Additionally, it allows administrators to understand the system's workload and adjust resource allocation as needed, optimizing performance and response times.
If the CPU encounters anomalies, such as excessively high temperatures, the BMC can monitor and provide warnings, enabling administrators to promptly respond and troubleshoot issues.
The BMC monitors and controls the following CPU features:
Get CPU temperature
Get CPU current power consumption
Get CPU maximum power capping
Get CPU current power capping
Set CPU power capping
The BMC is responsible for managing the cooling system by overseeing temperature sensors and regulating fan speeds based on a Fan Algorithm crafted by the thermal engineering team.
During the BMC boot process, if temperature readings from components are not successfully acquired, the BMC implements default fan control. In this scenario, all fans operate at a duty cycle of 80% until temperature data from all system sensors is accessible.
When the fan algorithm is active, the BMC manages fan speeds or initiates a system shutdown under specific conditions:
Condition for full speed fan operation:
A temperature of the component exceeds a specified threshold.
Temperature reading fails for more than 60 seconds.
A firmware update is initiated.
GPU does not align with system specifications.
Conditions for shut down the system:
Temperature exceeds a critical threshold for more than 60 seconds.
Temperature exceeds the specified threshold (UNR).
The system fans are divided into three fan zones, each serving a specific cooling function:
Fan Zone #1: Used for GPU sled cooling.
Fan Zone #2: Used for CPU sled cooling.
Fan Zone #3: Used for SSD cooling.
When a fan failure condition occurs, the BMC sets all remaining fans to run at full speed or shuts down the system. Once the fan failure condition is cleared, the BMC restores fan speed according to the fan control algorithm. Fan failures are classified into the following scenarios:
Fan Zone #1 Failure Conditions:
If either one or both fan rotors in the same fan are below the specified threshold (LC), all remaining fans in Fan Zone #1 run at full speed.
If two fan rotors are below the threshold (LC) in different fans, or if three or more fan rotors are below the threshold (LC), the system shuts down.
Fan Zone #2 Failure Conditions:
If one fan rotor is below the specified threshold (LC), all remaining fans in Fan Zone #2 run at full speed.
If two fan rotors are below the threshold (LC), the system shuts down.
Fan Zone #3 Failure Conditions:
If one fan rotor is below the specified threshold (LC), all remaining fans in Fan Zone #3 run at full speed.
If two fan rotors are below the threshold (LC), the system shuts down.
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Step 1 |
From the Navigation Pane, select . |
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Step 2 |
Select of the following tabs to view the properties:
You can view the following sensor properties:
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Step 1 |
From the Navigation Pane, select . |
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Step 2 |
Under LED light control, toggle the System identity LED button on or off to help locate the system. |
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