VM Connect takes long time

Hello,

I have a new cluster using 2012 R2 and have the problem that if I want to connect to a VM from the Hyper-V Manager (or Failover Cluster) the connection takes about 10 seconds or sometime even longer (20 seconds).

Does someone have any idea why this could be happening? Currently the servers are running in an isolated environment without internet connection, there are 2 DCs (2012 R2) with DNS which have been newly deployed just for this environment.

Any idea how to make the connection to the VMs faster? Could the lack of internet cause this problem?

Regards

Paul