Hi Simon,

I have noticed that in some cases after the upgrade you will need to follow the below proces, which I just added to my original post:

- Remove the original VXLAN configuration.

- Restart the vCNS web service (Exact commands were listed in my post vCloud Networking & Security 5.1.1 create dvPort Groups, but fails to create vmknic interfaces)

- Re-Add vCenter to vCNS

- Add the VXLAN Configuration again.

This seems for me to fix the problem in my lab and at a couple of customers.

Good luck!

Regards,

Eiad Al-Aqqad

B: http://www.Virtualizationteam.com

B: http://www.TSMGuru.com