Has your network experienced a WAN brownout?
In the context of WANs, a brownout is an episode of unknown duration where congestion-based packet loss and increases in latency and jitter cause poor application performance.
While most routing and SD-WAN systems properly handle blackouts such as total link, device, or WAN connection failure, a traditional router system and many SD-WAN solutions do nothing in the face of WAN brownouts. When people complain about a slow network, it usually means that they are experiencing an ongoing brownout due to network congestion. While it is easy to tell if a network has experienced a blackout, such as link or device failure, it can be more difficult to know if a network has experienced a brownout, and even harder to address the problem. Thanks to continuous, unidirectional measurement and the ability to make per-packet decisions, a failsafe SD-WAN solution can continue to deliver high quality of experience (QoE) in the face of a WAN brownout through techniques such as packet replication or subsecond switching of application traffic to WAN connections not experiencing brownout conditions.