Architecting a VMware NSX Solution : Design Considerations : 4.12 VMware NSX Distributed Logical Router : 4.12.1 Design Considerations
   
4.12.1 Design Considerations
The VMware NSX distributed logical router can scale up to 1,000 logical interfaces, which gives the provider the ability to allow the end users within the cloud environment the ability to deploy up to 1,000 networks within this distributed logical router.
For increased availability the distributed logical router control VM must be deployed in an HA pair. HA is provided in an active/standby configuration.
The distributed logical router is heavily dependent on the NSX Controller cluster. Verify that the controller cluster is up and running before making any changes to the distributed logical router.