A single thin device on the power grid.
A lean branch using an SD-WAN requires only a thin edge device. No more single-function devices for every conceivable network function including firewalling, content delivery, WAN optimization, web filtering, malware detection, VPN establishment and aggregation, packet steering, load-sharing, bandwidth management—all of these move to the cloud, eliminating the need for single-function devices in the branch, and allowing orchestration to be done remotely.
There are also data center benefits. Using cloud-delivered SD-WAN gateways, traffic can enter headless data centers without the need for multiple headend devices to secure, redirect, load-balance and filter traffic. This lowers both power data center consumption and cooling requirements.
Virtualization, cloud hosting, and multi-tenancy architectures allow many diverse applications and services to share physical servers. It provides scalable, on-demand access for users from anywhere, enhances failover designs, and significantly improves the algorithmic efficiency of energy consumption. It has been estimated that, on average, a single-application server may be 5%-15% utilized, while powered 100% of the time doing no additional useful work. Virtualization can result in a 10 to 1 server consolidation, dramatically shrinking energy consumption and bolstering efficiency that result in up to 75% less carbon emissions.
A cloud-delivered SD-WAN moves networking services, and its orchestration, into this efficient virtualization architecture. An SD-WAN also aggregates and load-shares available links and transport methods in a branch office location to dramatically increase bandwidth utilization.