Hyper-V host fails with "RPC Server unavailable" error when I try to promote Windows Server in virtual machine to a domain controller

Question

Host: Windows Server 2012 R2 with Hyper-V and RRAS (for Internet over NAT)
VM: Windows Server 2012 R2 with installed Active Directory Domain Services
When I open AD DS configuration window (“promote this server to a domain controller”) many services and programs on my host (include Hyper-V, RRAS & Server Manager) fails with RPC Server unavailable error.

Answer 1

Hello Aleksandr,
There wasn't any configuration information, ipconfig /all, network setup, etc. So it's difficult to tell.
More importantly, are you trying to promote the host server? If yes, that is not advised, for one, because it's a Hyper-V server, (not suggested at all), and two, RRAS is installed. RRAS is problematic with any domain controller because it turns it into
a multihomed domain controller.
Active Directory communication fails on multihomed domain controllers
http://support.microsoft.com/kb/272294/
Multihomed DCs (with more than one unteamed NIC or multiple IPs) with DNS, RRAS, iSCSI, Clustering interfaces, management interfaces, backup interfaces, and/or PPPoE adapters - A multihomed DC is not a recommended configuration, however there are ways to
configure a DC with registry mods:
http://blogs.msmvps.com/acefekay/2009/08/17/multihomed-dcs-with-dns-rras-and-or-pppoe-adapters/
7 Reasons not to Make Hyper-V a Domain Controller
http://www.altaro.com/hyper-v/reasons-not-to-make-hyper-v-a-domain-controller/
Domain Controller as Hyper-V host
https://social.technet.microsoft.com/Forums/windowsserver/en-US/4ff14bec-a815-473b-8d2a-33e91e17197b/domain-controller-as-hyperv-host?forum=winserverhyperv
Networking?
I don't know how your networking is setup, whether there are multiple NICs on the host server, if they are teamed, if you have the host interface set to allow the operating system to share administration, or if there are separate interfaces for each. Can
the host OS ping/communicate with the DC virtual machine?
If there are more than one NIC, you have the choice to team the NICs and share the Teamed NICs for the Hyper-V OS and the VMs, or keep them separate where one is devoted for the Hyper-V OS, and one for the VMs.
Hyper-V Server VLAN Network Configuration
https://social.technet.microsoft.com/Forums/windowsserver/en-US/0aa71d2a-ebf9-4a3e-bbf5-94db55339fa2/hyperv-server-vlan-network-configuration?forum=winserverhyperv 
Recommendation:
Why not just create another VM DC?
Ace Fekay
MVP, MCT, MCSE 2012, MCITP EA & MCTS Windows 2008/R2, Exchange 2013, 2010 EA & 2007, MCSE & MCSA 2003/2000, MCSA Messaging 2003
Microsoft Certified Trainer
Microsoft MVP - Directory Services
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