100G/40G Ethernet Ref Designs for 2x QSFP28 FMC

This is the documentation for the 100G/40G Ethernet reference designs for the Opsero 2x QSFP28 FMC. Each QSFP28 port is driven as a single 100GbE (CAUI-4) or 40GbE (40GBASE-R4) channel by the Ethernet MAC suited to the target device: the Versal Integrated MRMAC, the UltraScale+ Integrated 100G Ethernet (CMAC), or the soft 40G/50G Ethernet Subsystem.

User Guide

• Description
  • Block diagrams
  • Supported Hardware Platforms
  • Supported Software
• Requirements
  • Tools and licenses
  • Hardware
  • List of supported boards
• Build instructions
  • Source code
  • License requirements
  • Target designs
  • Cross-platform build runner
  • Output products
• Stand-alone Echo Server
  • Build the application
  • Set up the hardware
  • Run the application
  • Example usage
• PetaLinux
  • Requirements
  • How to build
  • What is in the image
  • Boot from SD card
  • Boot via JTAG
  • UART terminal
  • Using the QSFP28 ports
• Yocto
  • Requirements
  • How to build
  • What is in the image
  • Boot from SD card
  • Using the QSFP28 ports
  • BSP layout and fixes
• Testing under Linux
  • Interface names
  • Link bring-up and monitoring
  • The loopback self-test: qsfp-loopback-test
  • Inspecting a port with ethtool
  • Connecting to a host PC or switch
  • What to expect: throughput
  • QSFP28 module access
• Advanced: project structure and customization
  • Repository layout
  • Target naming
  • config/data.json and config/update.py
  • Build runner
  • Vivado side
  • Linux BSPs
  • Where build outputs land
• Troubleshooting
  • Build failures
  • Booting
  • Link problems
  • Traffic problems (link is up)
• Revision History
  • 2025.2