Classic Wide Area Networks (WAN)
Connecting users to business services and applications located in another site, be it another office, a Data Centre or the cloud, requires a wide area network (WAN). Classically, this would generally have been delivered using either:
- Dedicated network links such point-to-point lease lines or service-provider delivered MPLS
- Internet connections, using VPNs for security
Pros and Cons of Classic WAN
Dedicated Network Links/MLPS
VPN over the Internet
What is SD-WAN?
SD-WAN (Software-Defined Wide Area Networks) is the next generation of WAN technology, provided by vendors such as Cisco (SilverPeak), Palo Alto (Prisma & PAN-OS), Fortinet (FortiGate NGFW) and Versa (Secure SD-WAN).
It allows you to utilise the existing WAN technologies that best fit your requirements, whilst providing next-generation levels of security, manageability and visibility.
For example, rather than requiring a primary and backup MPLS link, you could implement a single MPLS link in a site, and provide a far less expensive direct internet link as the backup. This would allow you to direct your latency-sensitive application data over the expensive but reliable MPLS link, while other traffic was directed over the cheaper internet link, whilst still providing automatic failover in case of a failure of either of these links.
Challenges of building a WAN
Defining the requirements is key, but often challenging. Understanding what features and capabilities the network needs to support underpins the solution and will make the difference between success and failure.
The SD-WAN market has been in flux for a number of years. The amount of vendors has continued to grow and includes several SD-WAN specialists, as well strong offerings from all of the big players in networking and security. Selecting the correct vendor for this potentially large, long term investment is key as they all have strengths and weaknesses, so mistakes at this stage could have dire results.
Once the vendor has been selected, designing the new solution also brings challenges, including identifying the points of interconnect to existing services such as cloud resources and data centers, and determining how the new solution will integrate into the office networks.
Finally, the implementation of the new solution, and migration of offices and services to it, need careful consideration in order to minimise costs whilst ensuring that users’ access to business applications and services is not affected.
Our approach and benefits
We are always led by understanding the requirements of our clients. Fundamental to every engagement, we collaborate with you to help you to determine what is important, both now and in future.
Once the requirements are understood, we use our extensive experience in the field to identify and design the correct solution and then finally implement it, navigating the complexities of the migration from the previous solution.
Our experience in designing and implementing wide area networks and SD-WAN solutions allows us to select the solution that meets your requirements, and then navigate the potential pitfalls to ensure that the solution is deployed successfully.