Debugging 100G Access Switch in Nepal

To debug a 100G access switch, verify interface configuration, FEC settings, SFP compatibility, and monitor traffic using built-in hardware visualization tools.

Key Steps for Debugging

1. Verify Physical Connectivity and SFP Modules Ensure that the 100G SFP+ or QSFP modules are correctly seated and compatible with the switch model. Check that the correct media type (DAC, AOC, or fiber) is configured for each port . Inspect LEDs and port status indicators to confirm link integrity. 2. Check Forward Error Correction (FEC) FEC must be enabled on both ends of a 100G link. Mismatched FEC settings can prevent the interface from coming up or cause high error rates . Use the switch CLI or GUI to confirm FEC status. 3. Interface Configuration and Status Use CLI commands to display interface status, speed, duplex, and error counters. Look for CRC errors, packet drops, or mismatched MTU settings. Ensure that the interface is administratively up and that VLANs or VXLAN overlays are correctly assigned . 4. Traffic Monitoring and Visualization High-end 100G switches like the HSGQ-9032 support hardware-based traffic visualization using protocols such as RSPAN and sFlow. These tools allow you to monitor per-port traffic, detect congestion, and identify bottlenecks in real time . 5. Redundancy and Power Checks Verify that redundant power supplies and fans are operational. Hot-swappable modules should be tested to ensure failover works without packet loss . Check logs for over-current, over-voltage, or over-heat events. 6. Layer 2/3 Troubleshooting For managed switches, confirm MAC address tables, spanning tree status, and link aggregation (M-LAG) configurations. Misconfigured M-LAG or VLANs can cause traffic blackholing or loops . 7. End-to-End Testing Use a test device or laptop with a 100G-capable NIC to measure throughput between nodes. Document each test and isolate the segment causing performance degradation . Tools like iPerf or vendor-specific diagnostics can help quantify link performance.

Local Resources in Nepal

• D-TECH Trading offers HSGQ-9032 100G data center switches with spine-leaf architecture and hardware traffic visualization .
• First Aid Nepal provides managed and unmanaged switches from Dahua and Hikvision, along with installation support .
• Daraz.com.np lists various network switches for online purchase across Nepal .

Best Practices

• Maintain a network diagram and document all port assignments.
• Label cables and SFP modules for easier troubleshooting.
• Regularly update firmware to ensure compatibility and performance.
• Use monitoring tools to proactively detect errors before they impact production traffic. By following these steps, you can systematically debug a 100G access switch, ensure optimal performance, and leverage local suppliers and support in Nepal.