How is software-defined networking (SDN) facilitating a gradual shift to hybrid cloud networks?

Mobile connectivity is on the rise, bolstered by the massive technological transformation taking hold across the globe. The prevalence of mobile devices in such a scenario is growing rapidly. In fact, studies by the UN’s International Telecommunications Union (ITU) show that there were over 5.28 billion mobile subscriptions worldwide in 2019. By 2023, it has been predicted that the number of mobile owners will grow substantially to reach nearly 7.33 billion by 2023.

This surge in mobile device ownership, alongside server visualization and the emergence of cloud technologies is pushing businesses to reevaluate their traditional network architectures.
Conventional network architectures are hierarchical in nature. This means they are built on several tiers of Ethernet switches, making their design ill-suited to accommodate the evolving storage and computing needs of modern business networks.

This has led enterprises across the industrial landscape to seek more advanced and novel networking technologies to adequately support their network architectures. One such technology is software-defined networking or SDN technology.

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Software-defined networking architecture is much more flexible and dynamic as compared to its traditional counterpart and can, therefore, cater to the ever-changing networking needs of end-users, businesses, and markets.

Understanding software-defined networking (SDN)

In its early years, the networking domain was reigned largely by hardware solutions. This began to change with the advent of software-defined networking, which is a host of technologies that help separate the network control plane and the forwarding plane, in order to facilitate policy-based management and automation in provisioning of network resources. SDN technology is a highly agile and flexible solution for enterprises to accommodate their evolving bandwidth and network needs.

The origins of the software-defined networking (SDN) market can be traced back to a research alliance between the University of California at Berkley and Stanford University, which resulted in the introduction of the OpenFlow protocol in the 2008 era.

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OpenFlow is a key component that revolutionized networking software, representing one of the earliest SDN protocols. It gave rise to a programmable network system that could assist in the direction and management of traffic among switches and routers, regardless of the vendor who made them.

Since its inception, SDN technology has evolved significantly over the years to become a reliable and reputed networking technology, offered by several major vendors, including VMware, Cisco, Big Switch, Juniper, and Pluribus, among others. Many open-source software-defined networking solutions are developed by the Open Networking Foundation as well.

Impact of SDN technology on the rapid industrial shift towards hybrid cloud solutions

In recent years, there has been a rather sharp increase in the adoption of cloud technologies, by both public as well as private businesses, for the efficient hosting of their workloads. The rising number of cloud providers has facilitated this paradigm shift by coming up with lucrative and viable computing solutions for their consumers.

Hybrid cloud technologies, in particular, are gaining considerable traction, as they offer solutions that possess both the flexibility of public cloud solutions, as well as the security of the private cloud. This computing landscape, however, demands more standardized security and network policies, alongside higher compliance standards, both of which are delivered significantly by software-defined networking.

SDN technology offers a more application-oriented approach to data center networking, rather than the more network-oriented approach offered by conventional solutions. For this reason, software-defined networking is hailed as a game-changer in the hybrid cloud network space, seamlessly providing both – the responsiveness and elasticity that the technology demands.

Taking into account the rising rate of cloud adoption, as well as the subsequent rise in need for policy standardization and compliance in the present scenario, the integration of software-defined networking architecture across myriad cloud networks is paramount.

SDN technology for hybrid clouds offers a flexible solution for consistent policy push from a central orchestrator, across cloud infrastructures, both public and private. The advanced solution facilitates high levels of integration between network and cloud-native components, which in turn makes sure that there are no dependencies among the networking and cloud teams to fulfill business objectives.

Another integral aspect of SDN technology for hybrid clouds is the customer’s ability to utilize connectivity solutions like Express route and Direct connect, among others, to extend the reachability of control plane and management beyond the boundaries of the data center.

With software-defined networking offering such lucrative solutions for hybrid cloud computing, several key industry players like VMware are encouraging businesses to adopt or expand their SDN capabilities in their transition towards cloud-native application architectures or hybrid and multi-cloud environments.

VMware itself has added to its software-defined networking technology portfolio, the Virtual Cloud Network, by introducing two novel versions of its vRealize Network Insight and NSX-T software, to enhance network security and visibility and streamline network virtualization. This portfolio, which consists of the two new technologies as well as VeloCloud’s VMware SD-WAN, enables businesses to efficiently implement and manage their network security and connectivity, from branch locations and internal data centers to multi-cloud networks.

Many claim that software-defined networking could be the next evolution in technology. Indeed, SDN technology has plenty of benefits to offer enterprises that are seeking cost reductions, network performance enhancement, and system optimization. However, the real value of software-defined networking solutions is embedded not within the technology itself, but rather in its implementation. Used correctly, the technology will help transform business networking infrastructures through virtualization and could well become the key to taking cloud networking to new heights in terms of enhanced user experience and automation in the years to come.