esxi 6.0 to 6.0 U1a

Hello All

I am using VUM to install some R630s from esxi 6.0 to esxi 6.0 U1a.  We did this in the QA environment and basically just selected all patches for 6.0 and dell hardware.  We pushed the patches and everything worked just fine.  I copied the VUM patch configuration for our production environment but after the patches are applied and the esxi host reboots the network is gone.  To resolve the issue I have to reset the host configuration via the console and reboot. Once I do that every thing starts working again.

My question is why does it work in QA and not in Production where we have the same exact setup/configuration?

thanks

Ed