In the previous section, we discussed how to send network traffic from a user (or a group of users or a network) to a firewall and load balancer. We evaluated the requirement of the network to support the scenario, which included designing and implementing multiple routing and switching technologies, including VLANs and routing.
Now let's use the same example in an SDN world with ODL. We would like to perform basic service chaining with ODL to redirect a specific user's traffic to a firewall, then to a load balancer, and finally to a web server.
We will not be able to explain the entire process of configuration in a firewall and load balancer, but you can build this simple lab using open source tools, such as PFSence (open source firewall: https://www.pfsense.org/) and HA Proxy (open source load balancer: http://www.haproxy.org/). In addition, you can try using the evaluation version of commercial products, such as Juniper...