Migrate from Standard vSwitch to Distribute vSwitch

Today one of my students asked me to describe a procedure how to safety upgrade from VS to VDS, So I decide to write a checklist for it. Also a few days ago I talked about it in some of VMware community threads here: 618874 & 613321

1. First of all we must design & create the vSphere Distributed Switches based on vSphere networking assessments & virtual infrastructure requirements, Also configure Distribute uplink port Group. We must set the maximum number of required uplinks (VMNICs) for that VDS.
2. Add every ESXi hosts in the datacenter that you need to connect them to the VDS. Do not forget there is no dependencies or relations between ESXi hosts that are part of VDS and their membership in the existing clusters. So each host from every cluster can be added to the VDS.
3. Consider redundancy on physical uplinks on existing VSS! Yes it's better to do it. Although it's not a pre-requirments for VDS migration but for safety of migration procedure I always try to follow this instruction. So when we want to start the major migration operation, we can do it without any risk of network connectivity interruption. Otherwise if we can't provide any redundant uplink for the VSS, then we should run this step and three next ones in a single running of VSS to VDS migration wizard.
4. Move first series of physical uplinks, So we need to assign one of VMNICs from each Hosts as the VDS first uplink. Then check your co-existence of VSS and VDS and their connectivity.
5. Create a new Distributed Port Group and then migrate the VMkernel ports  to the new assigned dvPortGroup, especially that one is designed for the management port. Then check the host management connection after successful migration.
6. Create designed Port Groups for the virtual machine communications. Then migrate them with their associated uplinks to keep their connectivity.
7. Move all the remaining objects like the other VMNICs to the VDS. So after the last time of all networking communication checking, you can remove everything related to the VSS if you don't need them at all .

I hope it can be useful for you all ;)