An architect is designing a VMware Cloud Foundation (VCF) infrastructure Virtual Private Cloud (VPC) IP...

The correct limit is up to five Private Transit Gateway (TGW) IP blocks per VPC Connectivity Profile .

In the VCF 9 Virtual Networking Technical Reference, the IPAM model defines how address pools are exposed to VPCs. A VPC Connectivity Profile can contain both External IP Blocks and Private TGW IP Blocks , with each category supporting up to five IP blocks . The guide states that Private TGW blocks are assigned through the connectivity profile and are then used to allocate address space for Private-TGW subnets. ( Higher Logic Download )

Private-TGW addressing is scoped to the Transit Gateway and is particularly useful when multiple VPCs within the same NSX Project need routed communication with each other while keeping that address space private from external networks. The block is shared at the project/TGW level, and individual VPC subnets consume CIDRs from the available Private TGW blocks.

Therefore, an architect must account for the five-block maximum when planning IP address hierarchy, future subnet growth, aggregation strategy, and multi-tenant VPC expansion. If more address space is anticipated, the architect should choose sufficiently large, non-overlapping blocks from the outset rather than assuming an unlimited number of blocks can later be attached.

Study Guide References/Topics: VCF VPC IPAM; VPC Connectivity Profiles; Private Transit Gateway IP Blocks; Transit Gateway Networking; NSX VPC Address Management; IP Block Scalability.