A humanoid robotics research lab in France procured QSFP-100G-SR4 optical modules and M4-12FB-MPOU-MPOU fiber patch cables from AICPLIGHT to establish a high-speed data acquisition and processing link between their RuiJie RG-S6500 series switch and the NVIDIA Jetson Thor platform. This link was designed to leverage the Jetson Thor's capabilities, including its 4 x 25 GbE networking, camera offload engine, and Holoscan sensor bridge, for real-time high-speed sensor data ingestion.

The link failed to establish as expected. After contacting Ruijie's overseas technical support center, remote diagnostics concluded "no switch-related issues." With the OEM unable to provide an effective resolution, the project reached an impasse, severely impacting progress.

The client ultimately contacted AICPLIGHT. Our technical team responded swiftly and initiated efficient troubleshooting. Before accessing the client's remote environment, we deployed AICPLIGHT's proprietary "Optical Module No-Link Pre-Diagnosis Protocol" to guide the client through preliminary tests and narrow down the issue.

We instructed the client to perform Loopback tests on the equipment and collect logs. Results revealed:

Analysis 1: The NVIDIA Jetson Thor platform's physical 100GE QSFP28 port operates as four logical 25GE interfaces (visible via ip a as mgbe0_0, mgbe1_0, mgbe2_0, mgbe3_0) according to the product manual.

re normal, ruling out the possibility of optical module hardware failure.

According to AICPLIGHT's years of accumulated experience documented in the Optical Module No Link Failure Summary Manual, problems caused by inconsistent port default configurations are typically related to Auto-Negotiation, duplex mode, and FEC mode. In 25GE port scenarios, mismatched FEC mode is the most common issue.

With client authorization, AICPLIGHT technicians remotely adjusted the FEC mode configuration on ports Hundred Gigabit Ethernet 0/50:1~4 of the RuiJie RG-S6500 switch. Following configuration completion, both end ports instantly achieved Link Up.

Though the link was functional at 4x25GE, transmitting traffic still failed to meet the customer's high-performance requirements. The customer requested further implementation of 100G aggregated rate transmission.

AICPLIGHT proposed and implemented a LACP + Linux Bonding solution to achieve bandwidth aggregation, successfully enabled 100G transmission rates, delivering the desired outcome for the customer.

Even though the client only purchased AICPLIGHT's optical modules and fiber patch cables, AICPLIGHT provided end-to-end technical support after confirming hardware integrity. Breaking the limitations of OEM support, AICPLIGHT resolved cross-platform, cross-device configuration challenges that even the manufacturers couldn't solve.

Leveraging industry-leading No-Link Troubleshooting Manual and extensive hands-on expertise, AICPLIGHT streamlined the entire process—from pre-diagnosis to pinpointing the FEC mode mismatch. The systematic approach reduced troubleshooting time by 70%, preventing critical project delays.

AICPLIGHT go beyond mere "Link Up" status. By flexibly deploying LACP and Linux Bonding, AICPLIGHT transformed a 4x25G link into a 100G aggregated pipeline, meeting the client's high-performance requirements for real-time humanoid robotics research.

As praised by Daniel, the project lead: "Rapid response, field-tested expertise, and knowledge-sharing sessions."

AICPLIGHT empower clients through network training, enabling them to independently handle future issues—delivering value far beyond the product itself.