Let's understand the key NSX components:
- NSX Manager is the centralized network management component of NSX, and is installed as a virtual appliance. It provides an aggregated system view.
- NSX controller is the central control point for all logical switches within a network and maintains information of all virtual machines, hosts, logical switches, and VXLANs. The controller is running as a VM. For redundancy, a second controller can also serve as a standby VM. The controller supports two new logical switch control plane modes, Unicast and Hybrid. These modes decouple NSX from the physical network. VXLANs no longer require the physical network to support multicast.
- NSX Edge provides network edge security and gateway services to isolate a virtualized network and to bridge or route to physical network. You can install NSX edge either as a logical router or a services gateway.
- NSX vSwitch replaces the default Virtual Distributed Switch (VDS) on the kernel mode hypervisor on each host.