The Role of Disaggregated Routing for Enterprise Network Security

David Balaban
Published 11/24/2023
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Disaggregated Routing for Enterprise Network SecurityThe traditional wide area network (WAN) has a monolithic design. It means that switches and routers come as proprietary hardware with pre-installed software on board. This is a battle-tested approach, but with a nontrivial caveat. In a world of dynamic digital transformation, technological advancements, and ever-evolving cyber threats, it falls short of flexibility in terms of scaling, customization, upgrades, and security improvements.

The other pitfalls run the gamut from intricate licensing and sluggish updates of the bundled network operating system, to vendor lock-in and pricey network augmentation. As the snowball of these concerns grows over time, companies are stuck with a rudimentary application kit, a limited range of features, low business agility, scant edge computing potential, and exposure to security threats.

When it comes to harnessing innovation in network topology, few enterprises can afford to wait for a hardware refresh cycle that might move at a glacial pace. This is especially true of modern communications service providers (CSPs) and data centers whose networks must support a wide spectrum of services, handle immense traffic, and keep pace with technologies like 5G and AI. That’s where disaggregated routing steps in.

A Paradigm Shift

Disaggregation addresses the above concerns by introducing a model that breaks rigid ties between hardware and software. The lifeblood of this architecture is off-the-shelf white box hardware with a chipset optimized specifically for network operation purposes due to its high throughput and low latency.

This generic device can run any network operating system, giving organizations the freedom to choose the most suitable software environment for their needs and easily incorporate new applications as well as features down the road.

By and large, the things on the plus side of disaggregated networking include cost-effectiveness, vendor independence, flexibility, scalability, and rapid innovation. These often eclipse one extra advantage, which boils down to security.

Here Is How Disaggregation Makes Networks More Secure

By decoupling the software from the hardware (switches and routers), organizations gain more flexibility and control over security measures, which translates into enhanced protection capabilities. Here are some ways disaggregated design can harden network security:

  • Speedy updates and patches: Updates to the network operating system occur independently of the underlying hardware, so there’s no need to wait for the vendor to roll out a new version of their bundle. Furthermore, in a modular software architecture, components such as routing protocols, security features, and management functions can be updated or patched individually.
  • Diverse stack of security tools: Network disaggregation allows organizations to select the most suitable software ecosystem with advanced security and internet privacy features from different vendors.
  • Granular controls: Disaggregated networks offer finer-grained supervision over network devices and protocols. Network operators can configure security policies, access control rules, and threat detection mechanisms more precisely, ensuring that only authorized traffic flows through the enterprise environment.
  • Optimized isolation and segmentation: By separating the control plane and data plane functionalities, disaggregation helps contain security breaches and prevent lateral movement of malicious code within the network.
  • Extensive scalability of the security architecture: Disaggregated networks can scale security measures independently of the hardware, providing opportunities to adapt to evolving threats without tangible changes to the underlying infrastructure.
  • Custom security deployments: Organizations can create custom security features or integrate third-party protection tools seamlessly into their environments. This ensures that security measures align with specific organizational requirements and regulatory compliance standards.
  • Centralized supervision and management: Such network topology facilitates the management of security policies and configurations. This contributes to visibility and control, making it easier to detect and respond to malware attacks and other security incidents.
  • Secure boot and hardware verification: If available in a disaggregated hardware vendor’s portfolio, these features ensure that only trusted and verified components can run on the routing devices, mitigating the risk of unauthorized access and tampering.
  • Addressing the scourge of vendor lock-in: Using different providers for hardware and software components fosters vendor diversity. In the event of a security flaw, data breach, or unsatisfactory support from one vendor, companies can switch to another without overhauling the entire infrastructure.



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Despite these advantages, it’s worth emphasizing that network security is a multifaceted endeavor, and disaggregation alone cannot guarantee robust security. Implementing strong security practices, periodic audits, employee training, and adhering to industry-specific best practices are essential to maintaining a tamper-proof network territory.

The Industry Is Gaining Momentum

The principle of disaggregating hardware and software entered the networking conversation in the mid-2010s. Until then, the market had been dominated by vertically structured routing solutions from big-name vendors such as Cisco, Juniper, Nokia, and Huawei.

With this status quo in place, communication service providers, ISPs, and other organizations weren’t spoiled for choice in terms of building their backbone infrastructures, being locked into pricey tools with little innovation.

Disaggregated solutions have democratized the industry by removing the barriers between networking hardware and companies’ needs. At the heart of this philosophy is an end-to-end routing solution that combines silicon-based white box networking hardware such as Broadcom DNX and a common network operating system made with scalability, interoperability, feature set elasticity, security, and on-demand bandwidth growth capabilities in mind.

The beauty of this approach is that organizations can choose from a variety of supported hardware platforms, from small form factor to chassis-based switches with built-in redundancy and consolidated configuration interfaces. Furthermore, the underlying platform allows network operators to add a vast array of third-party applications and security features such as DDoS mitigation to their ecosystems.

Going Forward

The adoption of disaggregated routing represents a pivotal shift in enhancing enterprise network security. By decentralizing control, optimizing resource allocation, and facilitating rapid response to emerging threats, organizations can fortify their network defenses and safeguard sensitive data in an increasingly interconnected digital landscape.


Disclaimer: The author is completely responsible for the content of this article. The opinions expressed are their own and do not represent IEEE’s position nor that of the Computer Society nor its Leadership.