Last year I migrated from vcenter 5.5 windows physical server to a 6.5 appliance. I used the migration tool that created the appliance and migrated all the configuration and data to the new server. I have been looking at what it takes to upgrade from 6.5 to 6.7U1 and it looks like the same process that I used to migrate to 6.5 from 5.5, why is it necessary to create a whole new appliance and migrate all the data and configuration again? Is there any other method to do this?
No, this is how it works. Sometimes underlying OS changes (sometimes slightly; sometimes significantly) and a redeploy guarantees all the dependencies are correct. Why does it matter? The identity will be fully migrated to the new appliance, so it's not as if you have to give up anything or manually make changes after the upgrade occurs.
No, this is how it works. Sometimes underlying OS changes (sometimes slightly; sometimes significantly) and a redeploy guarantees all the dependencies are correct. Why does it matter? The identity will be fully migrated to the new appliance, so it's not as if you have to give up anything or manually make changes after the upgrade occurs.
Do I still have to create an ephemeral port to make it work , I did the last time
You should have one to begin with, so if you don't then yes. An ephemeral port group should continue to exist in your environment if you only use a vDS and have your vCSA joined to the vDS it provides.
Yes the one created still exist from my upgrade from 5.5 to 6.5, so I guess it can reuse that for the upgrade
Then that should work fine.