What is SD-Wan?

Software-defined WAN is a new approach to network connectivity that lowers operational costs and improves resource usage for multi-site deployments, allowing network administrators to use bandwidth more efficiently and ensure the highest possible level of performance for critical applications without sacrificing security or data privacy.

With SD-WAN, remote sites are connected over low-cost Internet links secured by VPN. MPLS-like reliability is provided through multiple uplinks with load balancing capabilities, intelligent path control, and automatic failover.

How does the magic happen?

  • Dynamic path selection: Traffic path chosen per-application based on loss, latency, and jitter
  • Traffic distribution over multiple pathways (Internet, cellular) with built-in load balancing and automatic fail-over capabilities
  • Network topology never changes (because it’s an overlay network), the only thing that could change is the ability to reach the next hop

What are the downsides?

  • Routing protocols compute best path for a given destination, not a given application
  • Best path computations are not influenced by real-time events such as lossy links or link congestion
  • In general, lower bandwidth links are not used to carry traffic (since they are not computed as the best path)

How can LMJ/Forte help with your SD-WAN requirements?

We are happy to engage in reviewing your requirements and providing technical consulting and hardware recommendations to maximize the benefits of your SD-WAN deployment.