This part discusses about how network topologies for data centers and branches.
- Branches to a private third party (VPN)
Customers who have a private data center or a cloud data center often want to connect it to their network without having to set up a tunnel from each branch office to the data center. A single link will be built from the closest SD-WAN Gateway to the customer’s current router or firewall after the site is marked as a Non-SD-WAN Destination. All the SD-WAN Edges that need to talk to the site will join to the same SD-WAN Gateway to send packets through the tunnel. This makes configuring the network and bringing up a new site easier overall.
- Network Topology for Data Centers
With or without an SD-WAN edge, a data center network layout includes a pair of hubs and a number of branches. Node A, B, and C all have hybrid WAN connections. Various sorts of branches exist.
The MPLS network communicates with all of the CE routers via peering and runs BGP. The L3 switch executes OSPF or BGP in conjunction with the CE router and firewall at Hub 1, Hub 2, and Silver 1 sites.
Sometimes, there may be multiple data centers that offer the same subnets at different prices. Both data centers can be configured as edge-to-edge VPN hubs in this case. All of the edges connect straight to each hub, so the hubs also connect straight to each other. Traffic is sent to the best current data center based on the cost of the route.
