By default, vCloud Director does not limit the size of memory, disks and number of vCPUs when creating a new virtual machine. This means the global configuration maximums for vSphere apply, which can be a problem for a service provider. Depending on the settings in the allocation model that a SP uses.
If you have already worked with IPv6 Default Routes in NSX 6.3, you may know the following problems: You set a static default route to ::/0, save your change and when you reload the page, the change is gone.
Or you want to upgrade the NSX Edge Gateways from version 6.2.x to 6.3.x and the Edge upgrade fails with an IPv6 error message.