Redundancy and fault tolerance
Fault tolerance ensures continuous and uninterrupted transmission of traffic over the SD-WAN network and functioning of network services. Fault tolerance is enhanced by the use of redundancy and failover mechanisms at different levels of the network infrastructure, for example, you can create backup service interfaces.
A fault-tolerant network can remain operational in case of minor problems as well as major disasters involving central components such as routers, links, and data centers. When a component fails, a backup component of the same type takes its place. For example, you can create a backup link to which traffic is transferred if the main link becomes unavailable.
Fault tolerance makes it easier to balance the load across multiple links by optimizing the utilization of traffic bandwidth and avoiding congestion. This helps avoid any existing link becoming a bottleneck in the network topology.
Kaspersky SD-WAN maintains continuous operation in the event of the following types of faults:
- Failure of a central component, such as orchestrator, SD-WAN Gateway, or SD-WAN Controller
- Failure or overload of communication channels between geographically redundant central components, when network components are located at geographically dispersed locations to make data storage more reliable
- Failure or congestion of communication channels between CPE devices and SD-WAN gateways
