If you want to provision machine blueprints across multiple regions you can use a universal transport zone and a Universal Distributed Logical Router (UDLR). You set up the UDLR as part of the deployment of the VMware Validated Design for the Software-Defined Data Center, and can then use it in the scenarios.
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If you use a UDLR, you cannot select one of the on-demand networking options during blueprint creation. You must set up networking in your environment first, and can then select the existing network when you create the blueprint.
You can instead use a DLR in conjunction with on-demand networking. However, each blueprint is tied to one region in that case. See Scenarios Solution Paths for background on the benefits and limitations of each solution path.
See the Checklist for Preparing NSX and Security Configuration, which is part of the vRealize Automation 7.2 documentation set, for details.
This scenario illustrates how to use a UDLR with a scenario. To use a UDLR with other scenarios, follow the steps for Region A but change the networking information.