Cisco Nexus 9000 Series Switch requirements When you deploy VMware NSX-T Data Center on a VxBlock System, some requirements apply to the Cisco Nexus 9000 Series (ToR) Switches. Ensure that the following requirements are met: L3 licensing is present on the switches. For specific licensing requirements, see Chapter 12: Licensing. All VMware and NSX-T VLANs are deployed. BGP is enabled and configured. Uplinks to the external network are configured as L3. If the uplinks are L2, a separate services engagement is needed to convert the uplinks to L3.