Enterprise Hubs Overview

An enterprise hub is an SD-WAN site that is used to carry site-to-site traffic between on-premise spoke sites and to break out backhaul (central breakout) traffic from on-premise spoke sites. An enterprise hub typically has a data center department behind it; however, this is not enforced in Contrail Service Orchestration (CSO). You add a enterprise hub from the Sites page.

You can add one or more enterprise hubs to act as central breakout (backhaul) nodes and then associate enterprise hubs with on-premise spoke sites. The enterprise hub that is associated with a spoke site functions like a data hub and performs the following functions:

Note You must attach an on‐premise spoke site (with SDWAN capability) to a provider hub site or an enterprise hub site, or to both hub sites.

If a tenant has more than one enterprise hub configured, CSO statically meshes these sites with overlay tunnels so that the enterprise hubs can exchange routing information for the on-premise spoke sites with which they are associated. This enables the site-to-site communication between the spoke sites that are associated with different enterprise hubs.

The creation of static tunnels between one enterprise hub and another and between a enterprise hub and a spoke site depends on matching mesh tags. These static tunnels are created during the Zero Touch Provisioning (ZTP) workflow. For more information about mesh tags, see Mesh Tags Overview.

Enterprise hubs can have their own departments similar to other sites. If an enterprise hub does not have directly connected LAN segments in the departments used by the associated spoke sites, then CSO automatically pushes the appropriate department virtual routing and forwarding (VRF) instances to the enterprise hub for connectivity.

Benefits of Enterprise Hubs