We have two server DL380 G8 with same hardware configuration. Both server integrate with 10gb 2P 560SFP+ network adapter and configure as NIC team. Both network card connect to the two Alcatel 6900 series managed switch. Both server can access Internet and another existing servers. We've installed Failover Cluster and Hyper-V feature on two servers, when we stop the cluster on server 1, the Hyper-V VMs will failover to sever 2 automatically. However, when we try to unplug the 10GB network cable on server 1, the VM cannot failover, although we still can ping to the Failover Cluster IP address.
And we try to use the 1 GB on board network card, it can failover.