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How to Choose a New Data Center Interconnect Bus

How to Choose a New Data Center Interconnect Bus

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How to Choose a New Data Center Interconnect Bus - MADIBA BAY OPTICS [PDF]

How to Choose a New Data Center Interconnect Bus - MADIBA BAY OPTICS

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Selecting a data center interconnect (DCI) bus requires balancing high throughput, low latency, reliability, and scalability to meet current and future data center demands.

Understand Your DCI Requirements

Start by defining the purpose of the interconnect. DCI links connect multiple data centers to enable disaster recovery, live workload migration, data replication, and distributed applications. Key considerations include:

  • Bandwidth needs: Estimate current and future traffic, especially for AI, high-performance computing, or multi-tenant environments, which may require 100 Tbps or more between sites .
  • Latency sensitivity: Applications like database replication or real-time analytics require predictable low latency.
  • Geographic diversity: Ensure redundancy and disaster recovery by connecting facilities in different locations.

Choose the Right Cabling and Busway

DCI cabling options include dark fiber, wavelength services, Ethernet circuits, or MPLS networks. Factors to evaluate:

  • Fiber type and count: High-fiber-count cables with single-mode fibers are cost-effective for high-throughput, short-distance links (2–3 km typical) and allow for future expansion .
  • Installation efficiency: Pre-terminated cables or stubbed hardware reduce labor-intensive processes like ribbon furcation and identification .
  • Busway vs. traditional cabling: Busway systems offer scalability, reliability, and easier expansion compared to traditional cabling, which may require rewiring for capacity increases .

Select Interconnect Hardware

Routers and switches for DCI must support high-throughput, low-latency, and always-on reliability:

  • DCI routers: Should handle traffic engineering via MPLS, Segment Routing, and EVPNs, and provide resiliency and scalability for evolving workloads .
  • Data center edge routers: Must support high port density, multiple protocols, and QoS for external connectivity. Some modern solutions combine DCI and edge functions in a single platform .
  • High-speed interconnects: For internal high-performance links, consider PCIe 6.0 or similar high-speed interconnects to support AI and HPC workloads, ensuring low insertion loss and signal integrity .

Plan for Redundancy and Future Growth

  • Dual-feed or redundant paths: Ensure uninterrupted operation even if one path fails .
  • Scalability: Choose modular systems that allow adding capacity without a complete overhaul. Busway systems and high-fiber-count cabling support future expansion .
  • Tip-to-tip solutions: Evaluate full end-to-end solutions, including OSP to ISP transitions, to minimize installation complexity and downtime .

Security and Performance Considerations

  • Private circuits: DCI should use dedicated connections rather than public internet to ensure predictable performance and enhanced security .
  • Monitoring and management: Implement tools to monitor bandwidth, latency, and link health to maintain service-level agreements.

Summary

Choosing a new DCI bus involves assessing bandwidth, latency, redundancy, cabling, and hardware options while planning for future growth. Prioritize scalable, reliable, and secure interconnects that can support AI, HPC, and distributed applications. Leveraging busway systems, high-fiber-count cabling, and versatile routers ensures your data center interconnect remains efficient, resilient, and future-ready.

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