Data Center Interconnect: What It Is and Why It Matters | eStruxture

Every second, businesses move massive amounts of data between locations. Customer transactions. Application workloads. Backup files. The question is: how does all that data travel securely and quickly from one data center to another? The answer is data center interconnect.

For companies running mission-critical operations across multiple facilities, understanding interconnection is not optional. It is essential. eStruxture highlights what data center interconnect means, how it works, and why it matters for businesses that cannot afford downtime.

What Is Data Center Interconnect?

Data center interconnect (DCI) is the networking infrastructure that links two or more data centers together. Think of it as a private highway for your data. Instead of traveling on the crowded public internet, your information moves through dedicated, high-speed circuits that connect your facilities directly.

This matters because the public internet is unpredictable. Traffic congestion, security vulnerabilities, and inconsistent performance can disrupt operations. DCI eliminates those risks by providing:

• Guaranteed bandwidth that does not fluctuate with internet traffic
• Low latency measured in single-digit milliseconds for metro connections
• Enhanced security through traffic isolation from public networks
• Predictable performance for time-sensitive applications

According to Global Market Insights, the global data center interconnect market reached USD 11.8 billion in 2025 and is growing at 13.6% annually through 2034. This growth reflects how critical reliable connectivity has become for modern enterprises.

How Does Data Center Interconnect Work?

DCI connections typically operate as Layer 2 Ethernet point-to-point links. In plain terms, this means data travels directly between two locations without passing through multiple network hops or routing decisions that add delay.

Here is how the process works:

• Physical connection: High-capacity fiber cables link data center facilities
• Network backbone: A redundant metro network carries the traffic
• Automatic failover: If one path fails, traffic instantly reroutes to alternate paths
• Cross-connects: Physical connections within each facility link your equipment to the network

The technology behind DCI includes Dense Wavelength Division Multiplexing (DWDM), which allows multiple data streams to travel simultaneously over a single fiber. Software-defined networking (SDN) adds intelligent traffic management and automation.

For businesses with Enterprise Colocation deployments, DCI creates a unified infrastructure across locations. Your servers in Montreal can communicate with your disaster recovery site in Toronto as if they were in the same building.

Why Businesses Need Data Center Interconnect

The shift to distributed computing has made DCI essential rather than optional. Here are the primary use cases driving adoption:

Disaster Recovery and Business Continuity

• When systems fail, every minute of downtime costs money. DCI enables real-time data replication between primary and backup sites. If your main data center goes offline, operations can shift to a secondary location with minimal data loss.

Workload Distribution and Load Balancing

• Modern applications often run across multiple locations. DCI allows organizations to distribute workloads based on capacity, cost, or geographic requirements. During peak demand, traffic can shift to facilities with available resources.

Hybrid Cloud Connectivity

• Many enterprises maintain private infrastructure while also using public cloud services. DCI provides the secure, high-speed links needed to move data between on-premises data centers and cloud platforms without exposing traffic to the public internet.

AI and High-Performance Computing

• Training AI models requires moving massive datasets between compute clusters. The low latency and high bandwidth of DCI make it possible to synchronize data across distributed GPU resources in near real-time.

Key Features to Look for in DCI Solutions

Not all interconnect services deliver the same value. When evaluating providers, consider these factors:

• Speed options: Look for connections ranging from 100Mbps to 10Gbps or higher. Your needs may grow, so scalability matters.

• Redundancy: A self-healing network with automatic failover protects against outages. Ask about the provider's backbone architecture.

• Connection types: EVPL (Ethernet Virtual Private Line) and EPL (Ethernet Private Line) serve different needs. EVPL allows multiple connections over shared infrastructure, while EPL provides dedicated point-to-point links.

• Support: 24/7/365 technical support ensures issues get resolved quickly, regardless of when they occur.

• Cross-connects included: Some providers charge separately for the physical connections within each facility. Bundled cross-connects simplify billing and reduce costs.

DCI in Canada: Connecting Major Markets

For organizations operating across Canada, geographic coverage determines which providers can meet their needs. The major data center markets include Montreal, Toronto, Vancouver, and Calgary.

eStruxture operates 16 facilities across these four markets, with DCI services connecting all locations within each metro network. This includes:

• Montreal: MTL-1 through MTL-5
• Toronto: TOR-1 through TOR-5
• Vancouver: VAN-1 through VAN-3
• Calgary: CAL-1 through CAL-3

The company's nx100Gbps fully redundant network backbone supports speeds from 100Mbps to 10Gbps, with both EVPL and EPL configurations available.

The Business Case for Data Center Interconnect

Investing in DCI delivers measurable returns across several dimensions. Reduced risk stands out as a primary benefit, since redundant connectivity and disaster recovery capabilities protect organizations against costly outages. For enterprises where downtime carries significant financial consequences, this protection can pay for itself quickly.

DCI also improves performance by enabling low-latency connections that support real-time applications, including financial trading, video conferencing, and database synchronization, which would otherwise struggle over public internet links. In addition, DCI simplifies operations, since managing a unified network across multiple facilities is generally more efficient than coordinating separate internet connections at each individual location.

Finally, DCI offers cost efficiency: while it requires upfront investment, it often costs less than the bandwidth and security measures that would be needed to achieve comparable performance over public networks.

Getting Started with Data Center Interconnect

Organizations considering DCI should start by mapping their current infrastructure and identifying connectivity requirements. Key questions include:

• Which facilities need to communicate with each other?
• What bandwidth do current and projected workloads require?
• How critical is low latency for your applications?
• What level of redundancy does your business continuity plan require?

With answers to these questions, you can evaluate providers and design a solution that fits your needs.

Contact us today to discuss how eStruxture's data center interconnect services can support your infrastructure requirements across Canada.