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Data Center Interconnect Platform

Fiber and communications infrastructure knowledge brief Published 15 Jun 2026

Prepared for preliminary research by the ENSAA knowledge desk. Confirm optical interfaces, port or core capacity, electrical input and output, enclosure protection, thermal design and installation limits against current standards and product documentation.

Data Center Interconnect (DCI) connects multiple data centers to enable high-speed, secure, and reliable data transfer for cloud, disaster recovery, and distributed applications.

Overview

Data Center Interconnect (DCI) is a technology that links two or more data centers over short, medium, or long distances using high-speed packet-optical connectivity, allowing geographically separated infrastructure to function as a unified environment.

DC

I is essential for sharing resources, balancing workloads, replicating data, and supporting disaster recovery across multiple sites. It provides predictable latency, guaranteed bandwidth, and enhanced security compared to public internet connections. Types of ConnectivityDCI solutions typically include three main types of connectivity: LAN Extension (Layer 2): Extends a single Layer 2 domain across data centers, enabling legacy applications and virtual machine mobility while maintaining transparent access to physical resources.

Layer 3 Extension: Provides routed connectivity for segmentation, virtualization, and file server backup applications, often using VPN-based solutions with bandwidth and QoS considerations.

SA

N Extension: Extends storage networks over distance, addressing latency and distance challenges, particularly for Fibre Channel traffic that cannot natively traverse IP networks. Additional components like Path Optimization and integration of network services (firewalls, load balancers) ensure efficient communication and workload migration between sites.

Technologies

Modern DC

I relies heavily on optical fiber communication, including single-mode fiber for long-distance transmission. Key technologies include: Dense Wavelength Division Multiplexing (DWDM): Allows multiple data channels over a single fiber using different light wavelengths. Coherent Optical Transmission: Supports high data rates, up to 400–800 Gbit/s per wavelength.

Subsea and Terrestrial Fiber Links: Enable intercontinental and regional connectivity for hyperscale cloud providers. Overlay Networks and Virtualization: MPLS, VPLS, and SDN technologies abstract physical connections for flexible, programmable network management. Applications and BenefitsDCI is critical for: Disaster Recovery: Ensures data replication and failover between geographically diverse sites.

Workload Migration: Supports live migration of virtual machines and distributed applications. Cloud and Hyperscale Operations: Enables high-bandwidth, low-latency connectivity for AI, big data, and global cloud services. Security and Performance: Private circuits reduce exposure to internet-based attacks and provide consistent performance.

Hyperscale providers like Google, Amazon, and Microsoft often build their own DCI infrastructure, including terrestrial and submarine fiber networks, to meet global connectivity demands.

Conclusion

Data Center Interconnect is a foundational technology for modern digital infrastructure, enabling multiple data centers to operate as a cohesive network. By leveraging high-speed optical links, advanced networking protocols, and virtualization, DCI ensures reliable, secure, and scalable connectivity for cloud computing, disaster recovery, and distributed applications across regions and continents.

Data Center Interconnect Platform - ENSAA OPTICAL NETWORKS [PDF]

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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