While looking at NSX resources, I ran across this , and thought it was worth sharing.

Thus, if your running a third party vSwitch, migrate…

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FAQ

What is happening with VMware’s third Party Virtual Switch Program?

VMware is discontinuing its third party virtual switch (vSwitch) program. VMware plans to deprecate the APIs in vSphere used by third party virtual switches in the future.

What third party vSwitch offerings will no longer be supported on vSphere?

The third party vSwitches available for vSphere include Cisco Nexus 1000V, Cisco VM-FEX, HPE 5900v and IBM DVS 5000v

What should customers do?

Customers are encouraged to migrate from third party distributed vSwitches including Cisco Nexus 1000V, Cisco VM-FEX, Cisco AVS, HPE 5900v and IBM DVS 5000v to vSphere Distributed Switch.

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“Resolution

VMware is announcing discontinuation of its third party virtual switch (vSwitch) program, and plans to deprecate the VMware vSphere APIs used by third party switches in the release following vSphere 6.5 Update 1. Subsequent vSphere versions will have the third party vSwitch APIs completely removed and third party vSwitches will no longer work.

This has no impact on existing use of third party vSwitch on supported vSphere release. It also has no impact on support already purchased from VMware or the support lifecycle for the product. For more information on the end of support for this product, see the VMware Lifecycle Product Matrix.

The third party switch APIs will work and be supported up to vSphere 6.5 Update 1.

VMware recommends migrating from third party distributed vSwitches including Cisco Nexus 1000V, Cisco VM-FEX, HPE 5900v and IBM DVS 5000v to vSphere Distributed Switch.

To assist in vSwitch migration, VMware offers a free migration tool for migrating from Nexus 1000v to VDS. In addition, VMware’s Professional Services Organization can provide services to customer to migrate from third party vSwitch to VDS.”

More on this https://kb.vmware.com/s/article/2149722