Re: vSS to vDS with LAG

I'm not sure if there is official documentation. But I did a similar migration (from vDS to vSS) and I can confirm that you will lose connectivity when you move one vmnic from one switch to another without preparation. I did a similar migration (from vDS to vSS) and followed these steps:

1. Shut vmnic0 in the port-channel to force traffic to vmnic1 (on the physical switch)
2. Remove vmnic0 from the port-channel and add it to a temporary port-channel
3. Remove vmnic0 from the vDS and add it to the vSS
4. No-shut vmnic0 (now you should have connectivity on the vSS)
5. Migrate vmkernel from vDS to vSS
6. Migrate VMs from vDS to vSS
7. Remove vmnic1 from the vDS and add it to the vSS
8. Move vmnic0 to the previous port-channel (on the physical switch)

I think these steps can also be used when you want to migrate a vSS to vDS.