An SD-WAN Edge in a data center can act as a hub to direct traffic to/from branches. The SD-WAN Edge can be used to manage both MPLS and Internet traffic. The hub in a data center can be configured in a one-arm or two-arm configuration. In addition, a data center can be used as a backup.
The following describes the various designs with different options of how SD-WAN Edge can be inserted into the topology.
|Hub 1||Data Center or regional hub site with SD-WAN Edge deployed in two-arm topology.|
|Hub 2||Data Center or regional hub site with SD-WAN Edge deployed in one-arm topology (same interface carries multiple WAN links).|
|Legacy 1 and 2||Classic MPLS sites.|
|Silver 1||SD-WAN Edge is deployed off-path. SD-WAN Edge creates overlay across both MPLS and Internet paths. Traffic is first diverted to the SD-WAN Edge.|
|Silver 2||SD-WAN Edge is deployed in-path as the default gateway. It is always the default gateway. This topology is simpler but makes SD-WAN Edge a single point of failure and may require HA.|
|Bronze 1||Dual-Internet site (one of the links is behind a NAT router).|