Huawei Core Switch Load

Monitoring and managing CPU and system load on Huawei core switches is essential for maintaining network performance and stability.

Understanding Core Switch Load

Huawei core switches, such as the CloudEngine S16700 and 16800-X series, are designed for high-performance environments with ultra-high-density 10GE/25GE/40GE/100GE/200GE/400GE ports and redundant components to ensure reliability . The load on a core switch typically refers to CPU usage, memory utilization, and forwarding performance, which can impact packet processing and network responsiveness.

Checking CPU Usage

To monitor CPU load on Huawei switches:

1. Display CPU Usage: Use the command display cpu [slot slot-id] to view the CPU usage for the system or individual slots. The output shows:
   • System CPU Using Percentage: Average CPU usage across the switch.
   • Current CPU Usage: Real-time usage for a specific CPU or slot .
2. Interpretation:
   • CPU usage consistently above 75% may indicate high load or potential performance issues.
   • Short-term spikes are normal, but sustained high usage requires investigation .

Identifying High Load Causes

High CPU load can result from:

• Excessive control plane traffic (e.g., routing protocol updates, ARP requests).
• Misconfigured services or loops in the network.
• Resource-intensive features like BGP-EVPN, VXLAN, or ACL processing.
• Software bugs or outdated firmware . Huawei documentation recommends focusing on the top tasks consuming CPU to identify the root cause and taking corrective actions, such as optimizing configurations or upgrading software.

Best Practices for Load Management

• Redundancy: Use redundant MPUs, power modules, and fan modules to maintain stability under load .
• Software Updates: Keep VRP software up to date to benefit from performance improvements and bug fixes.
• Traffic Segmentation: Offload heavy traffic to line cards or dedicated forwarding units to reduce CPU load.
• Monitoring Tools: Integrate with iMaster NCE-Campus or other NMS platforms for real-time monitoring and alerts .
• Configuration Optimization: Disable unnecessary services and optimize routing or ACL rules to reduce control plane processing.

Summary

Monitoring Huawei core switch load involves regularly checking CPU and system usage, identifying high-load tasks, and applying best practices such as redundancy, software updates, and traffic optimization. Proper load management ensures high network performance, reliability, and smooth operation in enterprise and data center environments .