VLANs specific to VMware NSX-T Data Center VMware NSX-T Data Center on VxBlock Systems requires three additional VLANs for the ToR switch pair. vcesys-nsx-transport The vcesys-nsx-transport VLAN carries all east-west data flows for overlay traffic between transport nodes. For VMware NSX-T Data Center on VxBlock System deployments, this network is defined as Layer 3 routable. If the use case requires transport nodes that are spread across multiple ToR switch pairs, the boundary between Layer 2 and Layer 3 is at the ToR switch pair. A VLAN cannot span that boundary. Examples include: A single-site multisystem deployment of VMware NSX-T Data Center A future multisite deployment of VMware NSX-T Data Center In these use cases, each L2 domain (ToR switch pair) must provision a unique subnet to hold the TEP IP addresses for the connected transport nodes. The transport nodes for each transport network subnet need to reach the other transport network subnets in the VMware NSX-T Data Center deployment. A routable transport network ensures that customer deployments are flexible and extensible for all current and future use cases. VLAN Description vcesys-nsx-edge01 This VLAN enables BGP peering between the T0 Gateway in the edge VM and the Cisco Nexus 9000 Series ToR switch on the A side of the network fabric. vcesys-nsx-edge02 This VLAN enables BGP peering between the T0 Gateway in the edge VM and the Cisco Nexus 9000 Series ToR switch on the B side of the network fabric.