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Why Cloud Needs SD-WAN


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What a wonderful day it is when I get to write about two of my favourite things; cloud and SD-WAN. Both have been making quite a splash in the world of IT since their conception, but it’s only recently that they’ve been put together to create an easier transition to cloud.

Software-defined (that’s the SD part) wide area network (aaaand that’s the WAN part) is a particular application of software-defined networking (SDN- this is going to get complicated) technology that’s applied to WAN connections. The purpose of SD-WAN is to integrate every aspect and corner of an organisation. And cloud….well, it’s cloud. If you’ve managed to find this blog post without knowing what cloud is I think you may be lost. Try Googling ‘cat videos’ instead.

Cloud, cloud, cloud. IT departments just can’t get enough of it. And for obvious reasons; easier analytics, scalability, cheaper cost- I could spend all day going on about
how fabulous cloud is (and I have). It’s getting to the cloud that can be the problem.

Once upon a time, at the very beginning of the story of the internet, organisations would connect computers through an internal network to move data around the building. Then, with the ability to connect outside the building, came the problem. With business branches scattered across the globe, the ability to connect, share and collaborate has never been more important. But getting everything safely and securely from A to B can be an issue. Once you leave the confines of the building network, all bets are off. With the increase in cybercrime, the threat of sensitive information getting hacked, or- worse yet- having an unknown infiltrate the once-secure network through small gaps in your architecture becomes more likely.

The importance of the network might not always be clear. In fact, unless you really have enough time to sit and think about it, its purpose might never have crossed your mind. Being able to virtualise a number of network functions from a central point, creating an abstraction layer that is custom-built for each organisation and each user is the ultimate goal. But where does SD-WAN fit into all this? It’s been said that SD-WAN will be the vehicle to bring virtualisation to the network, and without it, virtualisation to the cloud or data centre will never be achieved. Think about it, in this day and age we live and work on the edge of the cloud. It’s not a fad, it’s here to stay. But what exactly is the ‘cloud’? Nothing more than several computers, storage and plenty of cooling systems that all connect together to the outside.

Digital transformation has become another big thing in the last few years. Organisations are falling over themselves to adopt or transition to this mass integration into all areas of their business, fundamentally changing the way they operate and deliver value to their customers. But all of these new ways of doing and thinking can’t be built on foundations that were designed and created well before the idea of cloud. SD-WAN allows a more agile take on digital transformation, creating a cost-effective infrastructure that enables the leverage for cloud. With this level of agility, sites and their teams are easier than ever to support, and it’s all thanks to SD-WAN.

Additionally, traditional WAN architectures haven’t been designed to support the fast-changing consumption model of apps efficiently. Legacy WANs are past their sell-by date. Plagued from being MPLS-based with low bandwidth per site, with limited visibility and, crucially, not built for cloud, time is up. Under current legacy WANs, when a user needs to access an app in the cloud, they will do a sort of shuffle around until they hit it. This can lead to wasted bandwidth, extra costs and higher packet loss and latency. Under the traditional WAN model, organisations tend to not be able to afford them when management can be rigid, complex and cause network changes to be lengthy, All in all, it results in numerous inefficiencies and an expensive operation model. Finding the right SD-WAN solution will eliminate all of these issues, while supporting the new app consumption model. This basically means that policies can be defined based on business intent, resulting in steering traffic to where the app actually resides without having to take unnecessary shuffles or compromising on security.

In essence, SD-WAN is cloud’s best friend. And with cloud fast becoming the future of most organisations, it will be your best friend too. Provisioning for SD-WAN will not only make your move to cloud easier, but also more efficient. Contact us today to hear what we can do to help your transition to cloud, or book a free business case assessment to see how your IT environment can be improved.

Speak to an expert

Directors-9619Missy Beaudelot – Digital Marketing Executive
With a background in journalism and an interest in all things tech, Missy keeps our social media in check while monitoring our websites and developing our digital presence.

 

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