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The CPU Thresholding Notification feature notifies users when a predefined threshold of CPU usage is crossed by generating a Simple Network Management Protocol (SNMP) trap message for the top users of the CPU.
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CPU utilization averages are computed by Cisco IOS software using a 4-millisecond Network-to-Management Interface (NMI) tick. In the unlikely event where the traffic rate is a multiple of this tick rate over a prolonged period of time, the CPU Thresholding Notification feature may not accurately measure the CPU load.
The CPU Thresholding Notification feature allows you to configure CPU utilization thresholds that, when crossed, trigger a notification. Two types of CPU utilization threshold are supported:
A rising CPU utilization threshold specifies the percentage of CPU resources that, when exceeded for a configured period of time, triggers a CPU threshold notification.
A falling CPU utilization threshold specifies the percentage of CPU resources that, when CPU usage falls below this level for a configured period of time, triggers a CPU threshold notification.
To specify the recipient of SNMP notification operations and enable CPU thresholding notification, perform these steps:
To define a rising and a falling CPU threshold notification, perform these steps:
To set the process entry limit and the size of the history table for CPU utilization statistics, perform these steps:
The following example shows how to set a rising CPU thresholding notification for total CPU utilization. When total CPU utilization exceeds 80 percent for a period of 5 seconds or longer, a rising threshold notification is sent.
Router(config)# process cpu threshold type total rising 80 interval 5
Note |
When the optional falling arguments (percentage and seconds) are not specified, they take on the same values as the rising arguments (percentage and seconds). |
The following example shows how to set a falling CPU thresholding notification for total CPU utilization. When total CPU utilization, which at one point had risen above 80 percent and triggered a rising threshold notification, falls below 70 percent for a period of 5 seconds or longer, a falling threshold notification is sent.
Router(config)# process cpu threshold type total rising 80 interval 5 falling 70 interval 5
Note |
When the optional falling arguments (percentage and seconds) are not specified, they take on the same values as the rising arguments (percentage and seconds). |
For additional information related to the CPU Thresholding Notification feature, refer to the following references:
Related Topic |
Document Title |
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SNMP traps |
Configuration Fundamentals Command Reference |
Standards |
Title |
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No new or modified standards are supported by this feature and support for existing standards has not been modified by this feature. |
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MIBs |
MIBs Link |
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CISCO-PROCESS-MIB |
To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL: |
RFCs |
Title |
---|---|
No new or modified RFCs are supported by this feature and support for existing RFCs has not been modified by this feature. |
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Description |
Link |
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The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password. |
Table 1 | Feature Information for CPU Thresholding Notification |
Feature Name |
Releases |
Feature Information |
---|---|---|
CPU Thresholding Notification |
12.0(26)S 12.3(4)T 12.2(25)S |
The following commands were introduced or modified: process cpu statistics limit entry-percentage, process cpu threshold type, snmp-server enable traps cpu, snmp-server host. |
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