Use the display cpu-usage command to monitor CPU utilization and verify if it remains within normal thresholds.

Checking CPU Usage via CLI

1. Access the switch CLI through console, SSH, or Telnet.
2. Run the command:

   display cpu-usage This shows the CPU usage of the active MPU (Main Processing Unit) and provides short-term and long-term utilization statistics .

3. For modular or stacked switches, you can specify a slot:

   display cpu-usage slot <slot-id>

   • Non-cluster: displays CPU usage of the specified interface card.
   • Cluster: displays CPU usage of the cluster.
   • Stack: displays CPU usage of the switch specified by slot-id .
4. Repeat the command after a few seconds to verify consistency and observe trends .

Interpreting CPU Usage

• Normal operation: Long-term average CPU usage ≤ 80%, temporary peaks ≤ 95% .
• High CPU usage: If the average or current CPU usage exceeds 75%, it may indicate a problem that could affect services like BGP, VRRP, or user logins .
• Transient spikes: Short-term high CPU usage can occur during network management operations, querying all optical modules, or executing commands with large outputs. These are usually normal and do not require action .

Monitoring via Web Tools

Some Huijue switches provide a Web Tools dashboard with CPU and memory utilization widgets. You can view CPU usage as a percentage and click on the chart for detailed information .

Troubleshooting High CPU Usage

1. Monitor over time to distinguish between temporary spikes and sustained high usage .
2. Identify high CPU consumers using CLI commands to check active processes.
3. Check for network issues such as broadcast storms, loops, or excessive SNMP polling that may increase CPU load .
4. Take corrective actions like enabling storm control, loop detection protocols, or optimizing network management operations. By following these steps, you can effectively monitor CPU usage on a Huijue fiber optic switch, interpret the results, and take action if necessary.