The Universal Distributed Logical Router is installed in the kernel of every ESXi host, as such it requires a VM to provide the control plane.
The universal distributed logical router Control VM is the control plane component of the routing process, providing communication between NSX Manager and NSX Controller cluster through the User World Agent.
NSX Manager sends logical interface information to the Control VM and NSX Controller cluster, and the Control VM sends routing updates to the NSX Controller cluster.
I’ve created this animation with Apple’s Keynote, you can get your copy here – have fun!
