This article provides clarification on VMware Support for Partner Switches integrated through vSphere and NSX-T Public APIs.
Broadcom support desires a demarcation point to effectuate changes on the distributed switch without affecting other infrastructure switching and connectivity. This demarcation point is required to avoid causing a customer to experience a distorted configuration between the vSphere distributed virtual switch and the control and data planes of a partner switch when manipulating the distributed switch to troubleshoot issues. Most automation tools do not create a configuration link between the vSphere distributed switch and the physical switches.
In cases where there is no clear demarcation line,* Broadcom will require the following two steps to troubleshoot or manage issues related to vSphere, NSX-T, or NSX environments. Broadcom will request the creation of an environment free of the partner component in question** for troubleshooting purposes.