after windows update hyper v host has no network connection

We have a windows 2012r2 hyper v host running 6 vm's.

the hyper v host has veeam backup and replication and  had an ip assigned to be on the network , so it could be replicating to another hyper v server via veeam.

After installing windows update last Friday night, I discovered that although the 6vm's are on the network, the byper v host itself is not.

I am not sure on which nic on he hyper v host the ipconfiguration was tied to.

the vm's are using ....#4

I briefly added the ip configuration to the nic called internal1-1 , but did not connect to the network (I did not reboot)

how can I re-enable network access for the hyper v host again.!!

regards

Leopold