Hi there,
I have two identical servers with 2012 R2 installed and was having an issue with the Failover Cluster Virtual Adapter on one of them. I must have Hyper-V installed for some other software I am running, but we are not running an VMs. I installed the Hyper-v role first, set up NIC teaming and then installed the MS Failover Cluster feature. The problem I'm having is that one of the systems is showing an error with the Failover Cluster Virtual Adapter.
Opening Device Manager, the "Hyper-V Virtual Ethernet Adapter" is shown under the Network Adapter section with a yellow triangle, and the following message:
This device is not working properly because Windows cannot load the drivers required for this device. (Code 31)
I have since reinstalled MS FO Clustering but that did not fix it. I found an article about disabling IP offloading on the physical NICs part of the Teaming but that did not resolve it either after a MS FO Clustering reinstall. I have just uninstalled the FO Cluster and Hyper-V roles and trying a reinstall of both to see if it was a problem somewhere in Hyper-V.
A similar issue like this thread : https://social.technet.microsoft.com/Forums/en-US/1cc9cc76-6e5f-4198-9936-c6ffcb67328c/hyperv-virtual-ethernet-adapter-not-working-probperly-code-31-on-host?forum=virtualmachingmgrhyperv
Thanks,