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An administrator has been tasked with configuring the external connectivity for a Virtual Private Cloud (VPC) within a new VMware NSX project. The Transit Gateway (TGW) associated with the project will use VLAN(s) and external subnets to connect the VPC to the physical routers. What prerequisite must the administrator ensure is completed before starting the configuration of the external connection?
Correct Answer: C
The VMware Cloud Foundation 9.0 NSX Projects and VPC Guide outlines the prerequisites for configuring external connectivity using a Transit Gateway (TGW). When VLAN-backed external connectivity is used, the documentation specifies: "For VLAN-backed external connectivity, ensure that all hosts in the workload cluster where VPC workloads run have physical access to the VLAN(s) used by the Transit Gateway. This ensures end-to-end packet reachability between VPC segments and the physical router." Analysis of options: A (TWO BGP Peers): BGP can be configured later to enable dynamic routing but is not a prerequisite for establishing VLAN-backed connectivity. B (TNP attached): A Transport Node Profile is required for NSX host preparation, but it is part of the general NSX setup, not the specific prerequisite for TGW VLAN external connectivity. C (Access to VLANs): This is the critical prerequisite-hosts running workloads must have access to the external VLANs. Without this, connectivity to the physical routers will fail. D (Access to Edge TEP network): TEP networks are used for overlay traffic (Geneve encapsulation), not for VLAN-backed TGW external connectivity. Therefore, the correct prerequisite is ensuring all VPC workload hosts have access to the VLAN(s) used by the Distributed TGW. Reference: VMware Cloud Foundation 9.0 NSX Networking Guide - VPC External Connectivity (Transit Gateway VLAN-backed requirements). NSX Project/VPC documentation: VLAN access prerequisites for external connectivity.
