Architecture and design

This section will cover some of the most common SD-WAN architectures and considerations when planning your network. It’s important to note that there are many different ways to design your network that are not covered in this document. This section will introduce you to some of the most commonly used architectures to cover many different use cases.

Design	Business Application Location(s)	Common Use Cases:
Single datacenter	Single datacenter location	Private workloads and applications where stability is preferred
Multiple datacenters	Geo-redundant datacenter locations	Redundant, private workloads where datacenter location is preferred, and other locations are backups
Multi-region datacenters	Geo-redundant datacenters across different regions	Connectivity to other regions for some applications and services
Cloud on-ramp* (for static cloud environments)	Static cloud infrastructure	Connectivity to cloud services with a static gateway
Cloud on-ramp* (for dynamic cloud environments)	Dynamic cloud infrastructure	Connectivity to cloud services with a dynamic gateway

* Designs like direct internet access (DIA) and cloud on-ramp are typically used in conjunction with other designs. For example, The multiple datacenter designs can include DIA and cloud on-ramp.

This section includes the following topics:

• Single datacenter (active-passive gateway)
• Multiple datacenters (primary/secondary gateways)
• Multi-region datacenters
• Supplemental designs:
  • Direct internet access
  • Cloud on-ramp

See also Cloud on-ramp for static environments and Cloud on-ramp for dynamic environments.