What Are the Best Ethernet Testers for 100G and 400G Networks?

As networks continue to scale, demand for 100G and 400G Ethernet is rapidly increasing. From hyperscale data centres to backbone transport networks, validating high-speed links has become essential to guarantee throughput, latency, and quality of service.

To ensure reliable performance, engineers and operators rely on Ethernet testers. At RentalTec, we provide access to advanced solutions from EXFO and VIAVI, trusted vendors that cover the full spectrum of high-speed Ethernet testing.

Why Do You Need High-Speed Ethernet Testers?

Ethernet testers are used to validate performance, detect errors, and ensure compliance in both R&D labs and live networks. Typical applications include:

• Performance benchmarking at 100G and 400G Ethernet.
  
• Bit Error Rate (BER) testing for transmission reliability (RFC 2544 or RFC 6349 Test).
  
• Latency and jitter analysis to assure quality of service.
  
• Commissioning and maintenance of transport, metro, and backbone networks.
  
• Troubleshooting to isolate issues in complex infrastructures.
  

As the industry moves towards 400G and beyond, only next-generation testers can support these demanding speeds and protocols.

Highlight: EXFO FTBx-88480-400G

The EXFO FTBx-88480-400G is a high-performance module for 100G and 400G Ethernet testing.

✅ Key features:

• Supports 100G and 400G Ethernet testing.
  
• Advanced BER, latency, and jitter analysis.
  
• Compatible with the FTB-1v2 Pro mainframe, suitable for lab and field use.
  
• Upgradeable to 800G, making it a future-proof option for R&D and carriers.
  

Highlight: VIAVI ONA1000A-100-400

The VIAVI ONA1000A-100-400 delivers carrier-grade performance for Ethernet and transport network testing.

✅ Key features:

• Supports 100G and 400G Ethernet.
  
• Ideal for backbone, metro, and long-haul network validation.
  
• Advanced compliance and stress testing functions.
  
• Based on the ONA-1000A platform for scalable performance.
  

ℹ️ Note: Unlike EXFO’s solution, the ONA1000A-100-400 cannot be upgraded to 800G. VIAVI does offer an 800G tester (the ONA800), but this platform is not part of RentalTec’s stock.

Other Trusted 100G Testers

In addition to 400G-ready solutions, RentalTec also offers proven 100G field testers, widely used by operators and service providers:

• EXFO MaxTester 890: Portable 100G multi-service unit for Ethernet, OTN, SONET/SDH.
  
• VIAVI MTS-5800: Handheld 100G tester supporting Ethernet, OTU4 and multi-service applications.
  

These remain a solid choice for 100G deployments where portability and flexibility are key (Typical EXFO test: Y.1564 Ether SAM).

EXFO vs VIAVI: Which One to Choose?

Both EXFO FTBx-88480-400G and VIAVI ONA1000A-100-400 deliver excellent performance for 100G/400G Ethernet testing. The main difference lies in scalability:

• Choose the EXFO FTBx-88480-400G if you want a solution that can be upgraded to 800G in the future.
  
• Choose the VIAVI ONA1000A-100-400 if you need a robust, carrier-grade tester for 100G and 400G transport networks today.
  

For operators focused on 100G-only testing, the EXFO MaxTester 890 and VIAVI MTS-5800 remain trusted, portable alternatives.

Why Rent from RentalTec?

High-end Ethernet testers are a major investment. Renting with RentalTec gives you flexibility and peace of mind:

• Access the latest EXFO and VIAVI testers without upfront purchase.
  
• Scale your test capacity on demand.
  
• Receive calibrated, ready-to-use equipment with fast delivery.
  
• Benefit from our expert advice to match the right tester to your application.
  

✅ Looking for the best Ethernet tester for 100G or 400G?
Check our Ethernet tester portfolio or contact our team for expert guidance.