"Soft" defines the specification environment (SDNet) to extend to the data layer to achieve high-speed SDN

A month ago, at the Xilinx Emerging Technology Research Conference, Professor Nick McKeown, a professor of computer science at Stanford University, said that "the future SDN chip will look like an FPGA or a device that can be built on an FPGA. Parallel is a bottleneck in network processing." Therefore, an architecture similar to VLIW (Very Long Instruction Set Architecture) can be developed. The SDN compiler converts the target-independent specification into a target-independent configuration.” Nick McKeown mentioned at the time that Xilinx announced its network at Interop today. The soft definition specification environment (SDNet) in the design.

The SDNet environment allows you to define packet processing functions in a more natural way using high-level network specifications without defining the implementation details of the underlying network. SDNet can then automatically convert specifications into optimized hardware implementations based on Xilinx All Programmable devices, providing wire-speed processing performance.

System architects using SDNet don't need to know how to use FPGAs or even any FPGA expertise, all they need is to understand the network tasks they need to implement.

SDNet integration automatically generated development environment:
Custom hardware components for specific functions (eg parsing, editing)
Customized packet-based data-plane hardware subsystem based on user requirements Generated custom firmware for SDNet architecture Test platform for debugging and verification

The following diagram shows the process of implementing a network line card using SDNet and the Xilinx Vivado Design Suite:

The packet processing architecture generated by the SDNet environment supports non-disruptive updates. That is to say, the data layer processing function defined by SDNet can be modified in real time during the packet transmission process, and the line service is not affected, and no network downtime is required in the reconfiguration.

Where is the revolutionary innovation of Xilinx SDNet?

Loring Wirbel, a senior analyst at Linley Group, wrote in the white paper White Paper on SDNet:

“Because SDNet does not need to involve protocols, hardware implementations, and performance extensions, its flexibility is unique in the industry. Academia, network equipment manufacturers, NPU vendors, and EDA vendors have made many attempts to define groupings. Describe languages, parsing languages, and advanced tools to implement some of the features of designing soft network elements. But none of them can do what SDNet does."

The use of SDNet network reconfigurability is fundamentally different from SDN and software-defined networks. SDNet generates and manages control layer and data layer hardware and software configurations. The following figure defines SDN and "soft" network SDNet (Xilinx is based on SDNet). The network's name has been compared:

Want to see a live demo? Xilinx research engineer Mike AtTIg used a 3-minute video to show how fast it is to redefine a network system using SDNet while the network is running:

Note: The 3-minute video covers the concepts of redefining designs, compiling new designs, deploying hardware designs, and collecting new design data in real time, enough to give you an idea of ​​how SDNet changes the design of network devices.

The following is Xilinx Vice President Nick Possley about how SDNet launches a "soft" defined network, the benefits that SDNet brings to the system architecture and the innovation of SDNet.

Finally, here is the eeTImes website about SDNet release, Max Maxfield's take.

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