Application Aware Routing (AAR) a Key Enabler of SD-WAN and Hybrid WAN Automation
Posted by: Gary Kinghorn and Mostafa Mansour on December 21, 2016
More and more organizations are looking to apply software defined networking (SDN) concepts across their enterprise WAN, beyond the cloud and data center, to improve network and application performance while reducing the management overhead across remote sites and branches. While having a software-defined WAN (SD-WAN) can provide a myriad of benefits to both service providers (on-demand VPN offerings, e.g.) as well as enterprise customers (for their own branch network management), there is one primary use case or business driver that leads organizations to deploy SD-WAN: optimizing multiple WAN connections for cost and performance in real-time.
Optimizing MPLS and Internet broadband WAN links is sometimes called “Hybrid WAN”. Because that’s the sole capability provided by some vendor products, that term is sometimes used interchangeably with “SD-WAN” (but fans of Nuage Networks know that SD-WAN can be so much more J). Within the Nuage Networks Virtualized Network Services (VNS) platform, we refer to this capability as “Application Aware Routing”, or AAR. In the context of SD-WAN, AAR is the intelligent forwarding of application traffic across the enterprise WAN ensuring that pre-defined, per-application performance metrics, or service level agreements (SLA), are persistently met at the lowest achievable costs. And as with SDN, the real-time optimization and performance guarantees are adjusted automatically, based on centrally managed policies in the SDN (or in this case SD-WAN) controller. In other words, AAR delivers policy-based automation of performance management and WAN link optimization…