From VM cannot ping host or gateway

Hi all,

I have installed Hyper-V 2012 R2 core of a brand new Dell Poweredge R720 server in core mode, no GUI.

Then a VM with Windows 2012 R2 VM with GUi has been created with Hyper-V manager, no problems there.

I used the Virtual Switch Manager to create a Virtual LAN adapter and selected the network card as an external type because I want to share the Hyper-V host network card.

I start the virtual machine, go into network connections, configure a static IP is the same subnet as the Hyper-V host, default gateway, DNS server etc.

When I try to ping the Hyper-V host or the router's default gateway, I get that it is unreachable.

If I try to ping the VM from the host same thing, unreachable.

I made sure to disable the Firewall in the Hyper-V host as well as the Virtual Machine for testing purposes.

What is the problem here?

I read somewhere on google that although the hyper-v host network config may appear fine, it might be messed up.

Also if you have more than 1 physical network adapter how to I select the correct index for the NIC in Hyperv manager Virtual switch manager?

Any responses will be greatly appreciated.

Thanks and regards

Alfred