Common network topologies for OpenShift deployments

Though each and every network infrastructure is unique in one way or other, all of these networks have a lot in common and can be split into two different types:

• Physical or data center networks
• Virtual or cloud networks

Data center networks

Most of the physical and data center networks have a similar structures and components, such as the following:

• Core/spine layer switches: To interconnect different parts of the network, including aggregation/leaf switches, as well as, edge of the network and/or even Data Center Interconnect links
• Access/leaf switches: To connect physical servers to the revenue-generating network 
• Edge firewalls: To filter the external traffic to the inside of the network
• Border routers: To connect to the internet or any other external network
• Load balancers: To load balance the incoming traffic between groups of application servers

This is depicted on the following diagram:

Some of these components can be collapsed, such as firewalls...