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Endpoint Switch

Table of Contents

  1. Definition
  2. How it Works
  3. Features
  4. Benefits
  5. Enabling Technologies
  6. Rambus Technologies

What is an Endpoint Switch?

An Endpoint Switch is a network or system component that connects multiple endpoint devices, such as processors, memory modules, or peripherals, to a shared communication fabric. In high-speed interconnect architectures like PCI Express (PCIe) or Compute Express Link (CXL), endpoint switches enable scalable, low-latency data exchange between devices by routing traffic intelligently across multiple lanes or ports.

How an Endpoint Switch works

Endpoint switches operate at the transaction layer of interconnect protocols. They receive data packets from one endpoint, analyze routing information, and forward them to the appropriate destination. These switches support packet switching, flow control, and error detection mechanisms to ensure reliable and efficient communication. In PCIe systems, for example, endpoint switches allow multiple devices to share a single root complex, enabling modular expansion and resource sharing.

What are the key features of an Endpoint Switch?

  • Multi-port connectivity for endpoint devices
  • Support for PCIe Gen 4/5/6 and CXL 2.0/3.0 standards
  • Integrated error detection (e.g., ECRC, parity)
  • Hot-plug and dynamic reconfiguration capabilities
  • Low-power operation for energy-efficient systems
 

What are the benefits of an Endpoint Switch?

  • Scalability: Supports multiple endpoints in a single system, ideal for data centers and HPC environments.
  • Performance Optimization: Reduces latency and increases bandwidth by enabling parallel data paths.
  • Resource Sharing: Facilitates dynamic allocation of memory and compute resources across endpoints.
  • Fault Isolation: Enhances system reliability by isolating faults to individual endpoints.
 

Enabling Technologies

Endpoint switches are critical in:

  • PCIe-based systems for connecting GPUs, SSDs, and NICs
  • CXL fabrics for memory pooling and accelerator sharing
  • SoCs and embedded systems with multiple functional blocks
  • Data center architectures requiring high-speed, low-latency interconnects
 

Rambus Technologies

Rambus provides PCIe Controller IP and CXL Interface IP that support endpoint switch functionality in advanced computing systems. These IP cores are optimized for high throughput, low latency, and robust error handling, making them ideal for AI/ML workloads, cloud infrastructure, and automotive platforms. Click here to learn more about our PCIe Controller IP and here to learn about our CXL Controller IP.

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