An NSX Edge gateway is a perimeter device and for the same reason, all ingress and egress traffic from a network virtualized data center has to go through Edge devices and finally hit the upstream router. In our case three tier application is in need of communicating with an external network-192.168.100.0/24 which demands an Edge gateway to deployed. Let's deploy an NSX Edge gateway and connect with Distributed Logical Router. In a nutshell, all we are doing is connecting two routers together and creating a dynamic routing environment for them to exchange the networks, so that eventually, our three-tier application can communicate with network 192.168.100.0/24.
The steps are as follows: