Cloud repatriation, AI growth, and increasingly complex security threats are just some of the factors causing rapid changes in the technology landscape. When it comes to infrastructure upgrades, switch refreshes can no longer be treated as routine.
The next generation of network switches must do more than simply move packets. They need to serve as a foundation for the future; supporting smarter policies, providing increased visibility, and meeting the performance demands of tomorrow’s workloads.
Over the next six to twelve months, many businesses will be impacted by the end of life for critical Cisco data centre infrastructure. After years of extended support to maximize the value of these platforms, the market has evolved — with new performance, security, and scalability demands. The choices organisations make during this period will shape how well they’re prepared for what’s ahead in 2027 and beyond. This is no longer just about buying a better switch. It’s about choosing the right direction for your infrastructure.
Several major Cisco switching platforms are entering end-of-support stages, including models from the Nexus and Catalyst portfolios. Devices that reached end-of-support in February 2025 are already being replaced, with another significant wave in October 2025 and another in January 2027.
While it’s possible to extend support on legacy hardware, doing so introduces risks such as reduced access to updates, increased operational overheads, and widening security exposure. Legacy switches aren’t designed to support the new generation of workloads or security models, and given most refreshes are expected to last five to seven years, decisions made now must anticipate a fundamentally different data centre landscape.
Let’s be clear, no one is calling up their IT partner asking for “smart switches”. The term doesn’t resonate because what they’re really after isn’t a product, but a solution to a set of emerging challenges to bring visibility into complex environments, control over sprawling workloads, and the ability to adapt to a business and technology future still being defined.
This new generation of Cisco Smart Switches should be regarded as enablers rather than a point solution. Their value lies in facilitating policy enforcement at the switch layer, supporting future integration with agent-based security frameworks. They provide a path towards simplified, uniform network segmentation and control, which is important for customers aiming to:
Even if you don’t need all these capabilities today, deploying infrastructure that’s ready for what’s to come ensures your network won’t hold you back when they are.
Today’s data centre environments are a blend of traditional workloads, modern containerised applications, edge deployments, and AI workloads, all existing within the same infrastructure footprint.
In large enterprises, development teams are already shifting Kubernetes-based workloads back on-premises to cut cloud costs and restore performance control. These containerised environments often exist outside traditional network visibility, creating “black boxes” that security and network teams often find hard to monitor or protect.
What’s emerging is a need for infrastructure that supports:
While Cisco’s broader platform to unify these capabilities is still evolving, today’s smart switches form the essential building blocks. The right switch update today lays the foundation for policy consistency across physical and virtual infrastructure, including containers, VMs, and hybrid applications.
Every organisation has a different driver for refreshing their data centre switches. Whether it’s achieving the speed and throughput required for AI model training or enhancing segmentation and security controls at the edge, the motivation is increasingly shifting away from simple like-for-like replacements toward addressing specific organisational requirements.
Here’s a quick framework for thinking about which switch family might suit your needs:
If your priority is improved segmentation and bringing security policy enforcement closer to the workload, Cisco Smart Switches are your most future-aligned option. They support distributed enforcement models and will eventually integrate with broader agent-based policy systems.
When building on-prem AI workloads, especially those involving GPU-to-GPU communications, higher throughput and latency-optimised switching will likely be required. You may need ultra-high-throughput options such as Cisco Nexus 9300-GX series switches powered by Silicon One ASICs, which are designed for high-performance environments like AI model training and GPU-to-GPU communication demands.
If you are repatriating workloads from the cloud, or building containerised environments, having visibility and control over east-west traffic becomes essential. While Smart Switches don’t directly manage Kubernetes workloads, they enable consistent policy enforcement when used alongside agent-based solutions.
I’ll explore each of these scenarios in greater detail in a series of follow-up blogs.
The rapid changes in AI, infrastructure automation, and hybrid application architectures mean any decision now must consider what the business might look like in 2030.
This means considering not just what the business needs today, but what it may expect from its infrastructure in the years ahead. It’s why some customers are already extending refresh timelines or initiating earlier conversations to ensure they aren’t locked into the wrong model.
Don’t assume you’ll simply add security or scale performance later. Build the foundations now.
Every refresh journey begins with a decision point. For some, it’s driven by compliance or lifecycle timelines; for others, it’s about enabling new use cases that legacy switches can’t support.
If you’re unclear which direction to take, start with a conversation.
Data#3 network experts can help you:
Request a meeting with Data#3’s team of network specialists using the form below to schedule a straightforward, expert-led discussion designed to clarify your priorities and ensure you’re making informed decisions about your next refresh.
The network you build now is the one you’ll rely on in 2030, so make sure it’s ready.
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