Dynamic Routing provides the necessary forwarding information between Layer 2 broadcast domains.  There are 3 types of Dynamic Routing supported by VMware NSX OSPF, BGP, and IS-IS. NSX Edge supports OSPF, an interior gateway protocol that routes IP packets only within a single routing domain. It gathers link state information from available routers and constructs a topology map of the network. OSPF routing policies provide a dynamic process of traffic load balancing between routes of equal cost. An OSPF network is divided into routing areas to optimize traffic. An area is a logical collection of OSPF networks, routers, and links that have the same area identification. Areas are identified by an Area ID.