Article Overview
Use the display cpu-usage or display cpu commands to monitor CPU usage and memory status on Huijue switches.
Viewing CPU Usage
To check the CPU usage on your Huijue fiber optic switch, you can use the following commands:
display cpu-usage: Shows the CPU usage of the active processing unit. For modular or stacked switches, you can specify the slot ID usingdisplay cpu-usage slot <slot-id>to view CPU usage for a specific module or cluster .display cpu: Provides detailed CPU statistics, including the system CPU usage percentage over different time intervals (5 seconds, 1 minute, 5 minutes). Running this command multiple times helps determine if high CPU usage is persistent or temporary . A switch is generally considered to be operating normally if the long-term average CPU usage does not exceed 80% and the highest temporary usage does not exceed 95% . If CPU usage consistently exceeds 75%, it may indicate a performance issue .
Monitoring Memory Usage
While the commands above primarily focus on CPU, memory usage can often be monitored via:
- SNMP OIDs: Many switches, including Huijue and Huawei models, support SNMP monitoring for free memory and other system resources. You can query OIDs for memory usage using network monitoring tools .
- CLI commands: Some Huijue switches provide commands like
display memoryordisplay system resourcesto check memory allocation and usage.
Troubleshooting High CPU Usage
High CPU usage can cause network issues such as route flapping, frequent VRRP switchovers, or login failures . Common causes include:
- High levels of broadcast or multicast traffic
- Active routing protocols (e.g., OSPF, BGP)
- SNMP polling or network management operations
- Debugging or diagnostic commands running on the switch To address high CPU usage:
- Identify the processes consuming the most CPU using the CLI.
- Check for network storms or loops and implement storm control or loop prevention protocols.
- Reduce unnecessary management operations or heavy diagnostic commands . By regularly monitoring CPU and memory usage and addressing abnormal spikes, you can ensure stable performance of your Huijue fiber optic switch.
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