Chris Wahl from the Wahl Network comments:
While working on a data center migration project, a question came up about migrating workloads across vSphere clusters when the vMotion port group was not shared across clusters. As you may already be aware, there is a requirement that the virtual machine port group network be common on both sides. In the case of a distributed switch, this means that the VDS must be stretched to both clusters, and with a standard switch you must use the same name for your virtual machine port groups in both clusters. But, does the same requirement hold true for vMotion port groups?
Read more at: Workload Migrations Across Clusters With Non-Shared vMotion Port Groups