Testing record of 100G 10km transceiver on Arista 7060

Q1: What is a 100G QSFP28 LR4 10km optical transceiver?

Answer: A 100G QSFP28 LR4 10km optical transceiver is a high-speed optical module designed for 100 Gigabit Ethernet communication over single-mode fiber.

The module uses:

• QSFP28 form factor

• 100Gbps transmission rate

• 4 optical lanes

• LAN-WDM technology

• Up to 10km transmission distance

It is commonly used for:

• Data Center Interconnect (DCI)

• Enterprise backbone networks

• Cloud infrastructure

• Telecom access networks

The compact QSFP28 design provides high-density 100G connectivity while maintaining low power consumption and easy deployment.

Q2: Why is compatibility testing important for 100G optical transceivers?

Answer: Compatibility testing ensures that optical modules can operate correctly with different network equipment platforms.

During deployment, engineers need to verify:

• Switch recognition

• Module identification information

• Link establishment

• Transmission stability

• Network performance

Multi-vendor compatibility is especially important because enterprise and data center networks often combine equipment from different manufacturers.

Testing helps customers reduce deployment risks and ensure reliable network operation.

Q3: Why was the 100G LR4 transceiver tested on the Arista 7060 switch?

Answer: The Arista 7060 series is a high-performance data center switch platform supporting high-speed Ethernet connectivity, including 100G interfaces.

Testing the C-LIGHT 100G QSFP28 LR4 module on an Arista 7060 switch verifies:

• Hardware compatibility

• Correct module recognition

• Stable 100G link operation

• Practical deployment reliability

Successful testing provides customers with confidence when integrating third-party optical modules into existing network environments.

Q4: How does a 100G QSFP28 LR4 optical module achieve 10km transmission?

Answer: A 100G QSFP28 LR4 module achieves 10km transmission through multiple advanced optical technologies.

The main technologies include:

• Four-channel optical transmission

• LAN-WDM wavelength multiplexing

• Single-mode fiber communication

• High-performance optical components

The four optical channels combine to provide a total 100Gbps data rate while maintaining reliable transmission over longer fiber distances.

This makes LR4 an ideal solution between short-range data center connections and long-distance optical links.

Q5: What tests are performed during 100G LR4 optical module validation?

Answer: A professional optical module validation process includes several important tests.

Module Identification Testing

• Device recognition

• EEPROM information verification

• Vendor compatibility

Link Testing

• 100G link establishment

• Data transmission stability

• Interface status verification

Performance Testing

• Optical power measurement

• Signal quality evaluation

• Long-term operating stability

These tests ensure the optical module meets practical deployment requirements before large-scale network installation.

Q6: What are the applications of 100G QSFP28 LR4 10km optical transceivers?

Answer: 100G QSFP28 LR4 modules are widely used in networks requiring reliable 10km optical connectivity.

Typical applications include:

Data Center Networks

• Leaf-spine connections

• Data center interconnects

• High-speed uplinks

Enterprise Networks

• Campus backbone

• Core switching networks

Telecom Networks

• Metro connectivity

• Fiber access infrastructure

The 10km transmission capability provides a flexible solution for medium-distance 100G networking.

Q7: What is the difference between 100G LR4 and 100G ER4 optical transceivers?

Answer: The main difference between LR4 and ER4 is the supported transmission distance.

LR4 is commonly used for standard 10km optical connections, while ER4 is designed for longer-distance applications requiring higher optical budgets.

Q8: Why are 100G QSFP28 LR4 modules still important in modern networks?

Answer: Although 400G and 800G technologies are expanding rapidly, 100G QSFP28 LR4 remains an important optical connectivity solution.

Reasons include:

• Large installed 100G network base

• Cost-effective upgrades

• Wide equipment compatibility

• Reliable 10km transmission capability

100G LR4 continues supporting:

• Enterprise networks

• Cloud infrastructure

• Data center interconnect

• Telecom communication systems

It also provides a practical migration path toward future higher-speed networks.