Data center interconnection (DCI) provides reliable connections between multiple data center locations, enabling organizations to distribute their IT infrastructure without sacrificing functionality. This data center connectivity makes it possible to synchronize data in real time, distribute workloads, and guarantee business continuity. Modern businesses rely on fiber optic data center connections for their hybrid cloud architectures and multi-site operations.<\/p>\n
Data center interconnection is the technology that creates physical connections between two or more data centers, allowing them to function as a single integrated infrastructure. DCI enables applications, data, and services to move seamlessly between different locations, while users notice no difference in performance or availability.<\/p>\n
This connectivity plays a critical role in modern IT environments. Organizations spread their infrastructure across multiple locations to reduce risk and optimize performance. When one data center goes offline due to an outage or disaster, other locations automatically take over operations through the data center networking infrastructure.<\/p>\n
Disaster recovery and business continuity are key use cases for DCI. By continuously replicating data between data centers, critical systems remain available even during unexpected events. This prevents costly downtime and data loss that can disrupt business processes.<\/p>\n
Hybrid cloud architectures are impossible without reliable data center interconnection. Companies combine private data centers with public cloud services, with workloads moving dynamically based on capacity, cost, or compliance requirements. The connections between these environments must provide sufficient bandwidth and low latency to keep applications running smoothly. Explore our cloud solutions<\/a> to see how we support hybrid environments.<\/p>\n Multi-site operations benefit from DCI through more efficient use of resources. Computing power, storage, and network services can be shared across locations, maximizing the return on investment. Users connect to the nearest data center, which improves response times and optimizes the user experience.<\/p>\n DWDM (Dense Wavelength Division Multiplexing)<\/strong> forms the backbone of modern data center interconnection. This optical interconnect technology<\/a> transmits multiple data signals simultaneously over a single fiber optic cable by using different wavelengths of light. DWDM data centers can transport enormous amounts of data over distances of hundreds of kilometers without significant delay.<\/p>\n The technology comes in several variants. CWDM (Coarse Wavelength Division Multiplexing) offers fewer channels but is more cost-effective for shorter distances. DWDM delivers greater capacity and is suited for long distances between data centers. Coherent optics represents the latest generation, using advanced modulation techniques to enable even higher speeds.<\/p>\n Dark fiber data centers use unlit fiber optic cables that organizations manage and equip with their own networking hardware. This provides maximum control and flexibility, as you can configure and upgrade capacity entirely according to your own needs. Dark fiber is ideal when you want full autonomy over your data center connectivity.<\/p>\n Carrier Ethernet delivers standardized connectivity through service providers. This approach simplifies management because the provider is responsible for the underlying infrastructure. Carrier Ethernet scales easily from a few megabits to hundreds of gigabits, depending on your requirements.<\/p>\n Optical Transport Networks (OTN) provide a structured way to organize and manage data center traffic. OTN creates virtual paths through the network, with each path receiving guaranteed bandwidth and performance. This is valuable when different applications have specific requirements for latency and availability.<\/p>\n SFPs and transceivers form the physical interface between networking equipment and fiber optic cables. These small modules convert electrical signals into optical signals and vice versa. The choice of the right type (SFP, SFP+, QSFP28) determines the speed and reach of your connection. We work with high-quality transceivers from partners such as Adtran, Nokia, and Cisco to ensure reliable fiber optic data center connections.<\/p>\n Layer 1 connectivity provides pure physical connections without protocol processing. This delivers the lowest latency and highest transparency, as signals are passed through directly. Layer 2 connectivity adds Ethernet switching, offering greater flexibility for routing traffic and creating virtual networks between data centers.<\/p>\n The choice between these technologies depends on distance, capacity, and control requirements. Short distances within a single campus may be well served by simpler solutions, while connections between cities typically require DWDM or dark fiber for sufficient capacity and reliability.<\/p>\n Ready for the next step?<\/p>\n Explore our solutions or get in touch directly with one of our experts.<\/p>\n Bandwidth requirements are the starting point for any data center interconnection decision. Calculate how much data you need to transport between locations, including room for growth. Real-time data replication and live VM migration demand significantly more capacity than periodic backups. Do not underestimate the volume of traffic that applications generate when communicating between data centers.<\/p>\n The distance between locations determines which technologies are technically and economically viable. Data centers within a few kilometers of each other can connect using standard single-mode fiber and basic transceivers. Greater distances require more advanced optical interconnect solutions such as DWDM or coherent optics to compensate for signal loss.<\/p>\n The latency sensitivity of your applications has a significant influence on the decision. Financial transactions, VoIP, and real-time collaboration can tolerate only a few milliseconds of delay. Every additional kilometer adds approximately 5 microseconds of latency, which becomes noticeable over long distances. Layer 1 connections minimize processing delay compared to higher protocol layers.<\/p>\n Redundancy and failover capabilities are essential for business-critical connections. Single fiber connections pose a risk, as cable breaks or equipment failures can disrupt all communication. Implement redundant data center connections via geographically separate routes so that a single incident never affects both paths. Automatic failover ensures that traffic switches over within seconds when a problem occurs.<\/p>\n Scalability determines whether your solution is future-proof. Start with sufficient capacity for current needs, but choose technology that scales easily. DWDM allows you to activate additional wavelengths without laying new cables. Dark fiber offers maximum flexibility because you can upgrade the endpoint equipment without modifying the physical infrastructure.<\/p>\n Security requirements vary by industry and data type. Financial institutions and healthcare organizations often need to comply with strict regulatory rules. Layer 1 encryption protects data at the physical layer, before it even enters the network. This provides an additional layer of assurance on top of application-level security. Our security solutions<\/a> are designed to meet these demanding requirements.<\/p>\n The choice between dark fiber and managed services depends on your in-house expertise and need for control. Dark fiber gives you full autonomy but requires your own equipment and specialized knowledge. Managed services<\/a> simplify management because the provider maintains the infrastructure, though you have less direct control over configurations.<\/p>\n Budget considerations include both upfront investments and ongoing costs. Dark fiber requires higher initial capital expenditure for equipment but lower monthly costs. Managed services spread costs with predictable monthly fees. Calculate the total cost of ownership over several years to make a fair comparison.<\/p>\n Vendor-independent advice is valuable because no single vendor serves every situation optimally. We work with a range of partners including Adtran, Huawei, Nokia, and Cisco, which allows us to select the best solution for your specific situation. A consultative approach explores your needs first before recommending technology, rather than forcing a one-size-fits-all solution.<\/p>\n Latency management remains a persistent challenge in data center networking. Physical distance creates unavoidable delay that can affect applications. Database synchronization, storage replication, and distributed applications feel the impact of latency directly in their performance. Optimize protocols and eliminate unnecessary processing steps to keep delay to a minimum.<\/p>\n Ensuring redundancy and failover<\/strong> requires careful planning. Many organizations implement redundant connections but do not regularly test their failover procedures. When the primary connection fails, backup systems sometimes turn out to be misconfigured or lacking sufficient capacity. Test your redundant data center connections periodically under realistic conditions.<\/p>\n Security management across multiple connections becomes increasingly complex as your infrastructure grows. Every interconnection point represents a potential vulnerability if not properly secured. Physical layer encryption protects data before it leaves your data center, independent of higher protocol layers. Quantum security solutions prepare you for future threats that could compromise current encryption methods.<\/p>\n Multi-vendor environments create compatibility and management challenges. Different vendors use their own management tools and configuration methods. Standardize on open protocols and interfaces wherever possible to avoid vendor lock-in. We support implementations with equipment from a variety of partners, ensuring interoperability is guaranteed.<\/p>\n Future-proofing requires forward-thinking network design. Bandwidth demands are growing exponentially due to cloud adoption, video, IoT, and emerging technologies. Invest in infrastructure that scales without requiring a complete overhaul. Modular optical interconnect architectures let you expand capacity by upgrading components rather than replacing everything.<\/p>\n Network management complexity increases with every additional location and connection added. Monitoring, troubleshooting, and optimization require specialized expertise. Automated management tools help, but human expertise remains indispensable for strategic decisions and complex problems.<\/p>\n Specialized connectivity partners help overcome these challenges with end-to-end support. We not only offer cloud products but guide you through the entire process, from consulting and design to implementation and management. Our technical expertise in fiber optic communications and optical transport ensures your infrastructure performs at its best.<\/p>\n The right cloud solutions combine reliable hardware with well-considered network design. We translate complex connectivity challenges into practical implementations that support business-critical processes. By advising independently of any single vendor, we always find the solution that best fits your situation \u2014 without compromising on quality or future-proofing.<\/p>\n Ready for the next step?<\/p>\n Explore our solutions or get in touch directly with one of our experts.<\/p>\n \n Implementation time ranges from a few weeks to several months, depending on the chosen solution and distance. Managed services using existing carrier infrastructure are often operational within 4\u20138 weeks. Dark fiber implementations with custom equipment can take 3\u20136 months, especially when new fiber optic cables need to be laid or permits are required. Allow sufficient time for design, testing, and failover procedures before switching over production traffic. <\/p>\n <\/div>\n \n Costs consist of one-time investments (equipment, installation) and ongoing operational costs (circuits, maintenance). Dark fiber requires higher upfront expenditure (\u20ac50,000\u2013\u20ac200,000+ for equipment) but lower monthly costs (\u20ac500\u2013\u20ac5,000 per month). Managed carrier services have lower startup costs but higher monthly costs based on bandwidth (\u20ac1,000\u2013\u20ac20,000+ per month for 10\u2013100 Gbps). Distance, bandwidth, and redundancy requirements ultimately determine the final price. <\/p>\n <\/div>\n \n Yes, scalability is a key advantage of modern DCI solutions. DWDM systems let you start with a few wavelengths and activate additional channels later without laying new cables. With carrier services, you can often scale bandwidth within days through software configuration. When making your initial implementation, choose equipment and infrastructure that supports future growth so you do not have to replace everything within a few years. <\/p>\n <\/div>\n \n Conduct planned failover tests at least once per quarter by deliberately taking down the primary connection and monitoring how systems respond. Check whether traffic switches to the backup route within the desired timeframe (typically under 30 seconds) and whether all applications continue to function correctly. Also test scenarios such as simultaneous equipment failures and measure the impact on latency and bandwidth. Document the results and optimize configurations based on your findings. <\/p>\n <\/div>\n \n Essential tools include optical performance monitoring for signal strength and fault detection, network monitoring for bandwidth and latency, and end-to-end application monitoring to measure the user experience. Modern solutions often provide integrated dashboards that give real-time visibility into all connections. Choose tools that support multi-vendor environments and generate automatic alerts when anomalies occur, so you can intervene proactively before users are affected. <\/p>\n <\/div>\n \n Synchronous replication waits until data has been written at both locations before a transaction is considered complete, guaranteeing zero data loss but requiring lower latency (typically under 5 ms). Asynchronous replication confirms transactions immediately and replicates data with a delay, offering better performance but with the potential for data loss during outages. The choice depends on your Recovery Point Objective (RPO) and the distance between data centers \u2014 synchronous replication is practically unfeasible beyond 100\u2013150 kilometers. <\/p>\n <\/div>\n \n Implement geographically diverse routes where fiber optic cables run along completely separate paths, ideally through different infrastructure (separate conduits, bridges, or areas). Ensure that both routes use different telecom providers to eliminate the risk of shared infrastructure. Combine this with automatic failover mechanisms that detect within seconds when a route goes down and reroute traffic accordingly. Document the exact physical routes and verify regularly that they remain truly separate. <\/p>\n <\/div>\n <\/div>\n ","protected":false},"excerpt":{"rendered":" Datacenter interconnection (DCI) forms the backbone of modern IT infrastructure by creating reliable connections between multiple locations. With technologies such as DWDM, dark fiber, and optical transport, organizations can synchronize data in real time, distribute workloads, and ensure business continuity. This article explores the essential technologies, selection criteria, and challenges involved in setting up fiber connections between data centers. Discover which interconnection solution best fits your bandwidth, distance, and redundancy requirements.<\/p>\n","protected":false},"author":6,"featured_media":2597,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[79],"tags":[],"class_list":["post-5434","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-base"],"yoast_head":"\nWhat technologies are used for data center interconnection?<\/h2>\n
How do you choose the right interconnection solution for your data center?<\/h2>\n
What are the biggest challenges in data center interconnection?<\/h2>\n
Frequently Asked Questions<\/h2>\n
\n How long does it take to implement a data center interconnection solution? <\/h3>\n
\n What are the typical costs of data center interconnection and how are they calculated? <\/h3>\n
\n Can I start with a smaller capacity and scale up later? <\/h3>\n
\n How do I test whether my redundant connections actually work during an outage? <\/h3>\n
\n What monitoring and management tools do I need for data center interconnection? <\/h3>\n
\n What is the difference between synchronous and asynchronous data replication in DCI? <\/h3>\n
\n How do I protect my data center interconnection against physical cable breaks? <\/h3>\n