Network Identifying . . . . (stuck forever)

I have a two node Windows 2012 R2 cluster hosting Hyper-V guests. All server assets are virtualized including DNS, AD and DHCP and running as guest VMs. AD is hosted on Windows 2012 that has been recently upgraded to Windows 2012 R2. All computers
are fully patched and updated.
Its a single subnet private class C network with a dual NIC TMG host providing connectivity to internet. This TMG host is default gateway for all internal assets.
Recently (after upgrading AD host from Windows 2012 to Windows 2012/R2, but not sure if it related) servers are getting stuck on networking and network getting stuck on Identifying . . . and network access (RDP) is denied. Behavior
make sense that access is denied while server is evaluating the network. What makes it frustrating it cannot identify the network and stays in "Identifying" mode. One workaround I found is to use Hyper-V console logon to the machine,
disable and re-enable the NIC - and this is a manual intervention not a solution.
I tried bunch of different things but none sticking (temporarily feels like it problem is fixed but then it comes back in hours or days). I have not experience this issue on desktops connecting to the same network over wired or WiFi connection.
Things that I tried include:
Rebooting (yep!)
Removing the vNIC and adding back in again
disabling VMQ (Virtual Machine Queue) and twiddling NIC settings (physical network is attached to a 1 GB Dell Layer 3 Switch)
Removing virtual switch, re-creating and attaching the NICs to new virtual switch
Removing all VLANs - no VLANs physical or virtual
Changing the GPO (GPO -> Windows Settings -> Security Settings -> Network List Manager Policies )
Cleaning up (uninstalling) dead (old) NICs hidden in host device manager on VMs
Stopping windows firewall on servers.
Tried different suggestions that I found on internet (but they are mostly related to time prior to Windows 2012)
Re-validated Windows 2012 R2 based cluster configuration
This behavior is more prevalent on Windows 2012/R2 machines than on Windows 2008 hosts.
There is something obvious that I am missing or its a new feature/bug? Temporarily I changed the definition of Identifying network from "public" to "private" but that's not how I want to keep it (security!!).
Any suggestions? How do I make NIC identify the network and get out of this
Identifying . . . state?
Aamir M Qureshi http://www.agileconcepts.com/blogs/aq http://www.linkedin.com/in/aamirq
Update:
I build a new clean windows 2012 R2 from RTM and applied all updates and patches. All along machine was able to see the network without any problem.
Next I domain joined the machine and boom!! it broke network to Identifying . . .
So obviously there is something on AD/GPO that is effecting the machine behavior. Not so much of a AD/GPO expert but I tried and exhausted what I can think of.
Next to eliminate further, I created a new OU, moved the machine into newly created OU and in GPO Editor Blocked Inheritance. Gave it sometime. few GPUPDATE /FORCE and reboots. Now I am getting clean network and not
Identifying anymore.
I will be moving few other 2012/R2 VMs into newly created GPO-blocked OU and hoping to see the Identifying to go away for the moved machines. I will report update later in the forum.
Until then would be great if some can point me to how to fix/correct the Network Location setting in GPO.
----------------------- Oct 19, 2014 Update----------------
Having the machines out in newly created OU worked as long as GPO inheritance is blocked. This seems to be effecting Windows 2012 (R2) machines.
So the question is how to "educate" Network Location Identifying process that it is connected to right network? It gets pretty painful when a machine like DC or TMG is restarted and its waiting on
Identifying requiring a manual intervention (not through RDP but using Hyper-V console to recycle the Network Adapter (disable/enable) to find itself.
This troubleshooting took away my weekend, I have a solution but solution is not making me feel good or feeling I learned something new. :-(

Please note this issue is not with one single VM. This is the behavior on all Windows 2012/R2 VMs. Or at least I am focused in Windows 2012 R2 computers.
I think I am up to something, means to a solution that I will post back later (once I have more confidence into it)
In GPO, there is nothing in [Computer configuration-->administrative templates-->network-->DNS client]. Anything that I had I removed it and all settings are default (i.e. Not Configured).
Below at the end is the output of IPCONFIG /ALL. This is from a VM that is getting IP from DHCP. There are five other machines with static IP addresses from the same subnet. Also note that DHCP is running off the same VM that is hosting DNS (and AD) which
to my understanding means it is finding the network services fines.
C:\Windows\system32>ipconfig /all
Windows IP Configuration
   Host Name . . . . . . . . . . . . : X301
   Primary Dns Suffix . . . . . . . : agileconcepts.com
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : agileconcepts.com
Ethernet adapter Ethernet:
   Connection-specific DNS Suffix . : agileconcepts.com
   Description . . . . . . . . . . . : Microsoft Hyper-V Network Adapter
   Physical Address. . . . . . . . . : 00-15-5D-64-6B-31
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 192.168.100.112(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Tuesday, October 21, 2014 10:44:06 PM
   Lease Expires . . . . . . . . . . : Friday, October 24, 2014 10:44:05 PM
   Default Gateway . . . . . . . . . : 192.168.100.100
   DHCP Server . . . . . . . . . . . : 192.168.100.26
   DNS Servers . . . . . . . . . . . : 192.168.100.26
   NetBIOS over Tcpip. . . . . . . . : Enabled
Tunnel adapter isatap.agileconcepts.com:
   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix . :
   Description . . . . . . . . . . . : Microsoft ISATAP Adapter
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
C:\Windows\system32>
Aamir M Qureshi http://www.agileconcepts.com/blogs/aq http://www.linkedin.com/in/aamirq

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Use this powershell script it makes necessary changes in registry i found it on the web looking for solution to the same problem under vmware network adapters and modified it to work with tap open vpn devices.
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# *NdisDeviceType
# The type of the device. The default value is zero, which indicates a standard
# networking device that connects to a network.
# Set *NdisDeviceType to NDIS_DEVICE_TYPE_ENDPOINT (1) if this device is an
# endpoint device and is not a true network interface that connects to a network.
# For example, you must specify NDIS_DEVICE_TYPE_ENDPOINT for devices such as
# smart phones that use a networking infrastructure to communicate to the local
# computer system but do not provide connectivity to an external network.
# Usage: run in an elevated shell (vista/longhorn) or as adminstrator (xp/2003).
# PS> .\fix-vmnet-adapters.ps1
# boilerplate elevation check
$identity = [Security.Principal.WindowsIdentity]::GetCurrent()
$principal = new-object Security.Principal.WindowsPrincipal $identity
$elevated = $principal.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)
if (-not $elevated) {
$error = "Sorry, you need to run this script"
if ([System.Environment]::OSVersion.Version.Major -gt 5) {
$error += " in an elevated shell."
} else {
$error += " as Administrator."
throw $error
function confirm {
$host.ui.PromptForChoice("Continue", "Process adapter?", [Management.Automation.Host.ChoiceDescription[]]@("&No", "&Yes"), 0) -eq $true}
# adapters key
pushd 'hklm:\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}'
# ignore and continue on error
dir -ea 0 | % {
$node = $_.pspath
$desc = gp $node -name driverdesc
if ($desc -like "*TAP-Win*") {
write-host ("Found adapter: {0} " -f $desc.driverdesc)
if (confirm) {
new-itemproperty $node -name '*NdisDeviceType' -propertytype dword -value 1
popd
# disable/enable network adapters
gwmi win32_networkadapter | ? {$_.name -like "*TAP-Win*" } | % {
# disable
write-host -nonew "Disabling $($_.name) ... "
$result = $_.Disable()
if ($result.ReturnValue -eq -0) { write-host " success." } else { write-host " failed." }
# enable
write-host -nonew "Enabling $($_.name) ... "
$result = $_.Enable()
if ($result.ReturnValue -eq -0) { write-host " success." } else { write-host " failed." }
Jarek

Formatting SSD takes forever (stuck)

So, I put a new SSD in my MacBook Pro (13", early 2011). Worked fine, formatted it and launched the restore. The problem was (I found out a day later) the backup drive was connected by USB before start up. Turns out, it copies at USB 1.1 speeds if done so, so the restore would take 4 days! I canceled the restore and tried again. But this time the erasing seemed to be stuck. After about 4 hours I canceled the restore again, to try formatting manually. Also manually formatting, by both Disk Utility or Terminal, seems to be stuck. Even after 6 hours the process was still at 50%. Trying to create a Logical Volume on the SSD returned an error: "unable to unmount the Disk", but when using the 'diskutil unmountDisk' command it unmounted just fine! Also, the S.M.A.R.T.-status is verified and checking the disk doesn't return any error. What could be the problem?
The SSD is a Crucial M500 480GB and is installed in the normal hard drive bay.

No, I just use normal formatting. I tried both erase and partitioning. Neither worked. Also, creating a Logical Volume on just the current (corrupt) partition (disk0s2) seems to unmount the disk fine, but also gets stuck forever in formatting.

Network Identifying . . . . (stuck forever)

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