Unpacking the Network – third edition

 While developments in AI, cybersecurity, software-defined and hybrid work grab much of the attention of IT professionals these days, there have been some key and foundational developments in the networking space that need some airtime. Two topics I’ll dive into today are the evolution of network campus architectures with network fabrics, and the convergence of IT and OT.

Unlocking the Future of Network Campus Architectures with Network Fabrics

The traditional network architecture approach is under pressure. The rise of the mobile first approach, the increased focus on cyber and the advent of the “work anywhere” approach introduced with hybrid work have challenged IT professionals in how they build out their campus network architecture. Traditionally, networks were structured using a three-tiered model comprising core, aggregation, and access layers. These networks ran a combination of Layer 2 and Layer 3 protocols to provide connectivity for users and devices. However, with the shift to wireless connectivity, the increased focus on cyber and the desire to “work from anywhere” have made apparent the limitations of those traditional network architectures.

Many organizations still use Layer 2 protocols to manage access connectivity, which, while common, are not optimised for configuration simplicity, particularly in mobility use cases. To support mobility, overlays were introduced, but they add complexity to network configurations. As a result, many customers can find their LAN network architecture to be unwieldy and difficult to manage.

The introduction of software-defined management planes has helped to simplify NetOps workflows, yet these solutions do not address simplifying the underlying network complexity. Enter Network Fabrics—a transformative approach that offers a streamlined, efficient, and secure alternative to traditional network architectures.

Next steps with Network Fabrics 

When implemented correctly, Network Fabrics can eliminate the need for Layer 2 protocols by extending Layer 3 protocols to the network's edge. This shift dramatically reduces the size of network configurations, simplifying both deployment and troubleshooting. Smaller configurations mean fewer opportunities for errors and quicker resolution of issues when they arise.

Layer 3 protocols excel at determining the most efficient pathways for data, enhancing network resilience by quickly reconverging around failed links. Beyond performance improvements, Network Fabrics embed Zero Trust constructs, assigning security access rights to every connected user and device. This integration ensures that the network itself enforces your company's security posture, making it a critical component of your overall cybersecurity strategy. 

Network Fabrics also offer a simplified solution for implementing network segmentation, a vital feature in today's threat landscape. By limiting the lateral spread of malware, these fabrics provide an additional layer of defence against potential breaches. 

Furthermore, Network Fabrics can eliminate the need for a traditional wireless overlay used to transport wireless data while supporting roaming. This opens up the ability of wireless users to utilise the full spectrum bandwidth offered by the wired network while still seamlessly roaming across the network.

Key takeaways on why network fabrics are the way to go

         1.      Simplified Network Protocol Stack: Implementing a Network Fabric yields a simpler network protocol stack, reducing configuration complexity and simplifying network operations.

         2.      Embedded Zero Trust Principles: Network Fabrics natively embed Zero Trust principles, enabling the network to act as both a sensor and enforcer of your company’s security posture.

         3.      Unified Wired and Wireless Policy: Network Fabrics unify security policies for wired and wireless users, leveraging the full spectrum of wired bandwidth to support wireless users effectively.

Network Fabrics represent a significant leap forward in network campus architecture, offering a more efficient, secure, and manageable solution for modern IT environments. By embracing this innovative approach, organisations can ensure their networks are not only prepared to meet current demands but are also future proofed for the challenges ahead. 

Navigating the Future: The Convergence of IT and OT

 Reflecting on the evolution of network convergence, we've witnessed several transformative phases over the decades. In the 1990s, SNA (IBM Mainframe networks) converged onto IP Networks. The 2000s saw the convergence of Voice onto IP Networks (VoIP), and in the 2010s, Video followed suit. Today, we are at the forefront of yet another significant convergence event—the integration of Operational Technology (OT) onto our IP networks.

The Landscape of OT Convergence

 In today’s interconnected world, OT convergence is unfolding on multiple fronts, from smart buildings to industrial operational technology. Cisco’s recently released State of Industrial Networking Report sheds light on this evolving landscape, drawing insights from over 1,000 global OT leaders.

 Key findings from the report highlight that cybersecurity is the top concern for executives driving OT convergence, identified as the primary barrier to growth. An overwhelming 87% of respondents recognize the significant value in a unified cybersecurity solution that spans both enterprise and operational technology.

Investment priorities in this space are telling:

         •       Cybersecurity (43%)

         •       Artificial Intelligence (42%)

         •       Cloud Computing (32%)

         •       Robotics (30%)

For a deeper dive into these insights, you can explore the full report here. 

The convergence of IT and OT presents both opportunities and challenges. On the one hand, it promises enhanced efficiency, better data analytics, and improved decision-making capabilities. On the other hand, it introduces new complexities in managing and securing these integrated environments. 

Cybersecurity remains the linchpin of this convergence. As OT systems become more interconnected with IT networks, the attack surface expands, necessitating robust, unified security measures. This convergence also demands a revaluation of existing security protocols and the adoption of advanced technologies such as AI and machine learning to proactively detect and mitigate threats.

As we navigate this convergence, it’s essential to recognise the strategic importance of investments in cybersecurity, AI, cloud computing, and robotics. These technologies are not just enablers but are foundational to the successful integration of IT and OT. 

The convergence of IT and OT represents a pivotal moment in the evolution of network architectures. It’s an opportunity to rethink how we design, manage, and secure our networks to support the next generation of connected environments. As we continue to explore this frontier, Cisco stands ready to partner with organisations, providing the tools and insights needed to navigate this complex landscape.

Stay tuned as we watch the future of networking evolve and how the convergence of IT and OT will redefine what’s possible. How are you navigating the network?