I'm experience strange connectivity issues on a Windows Server 2012 R2 Standard installation with installed Hyper-V role and one Server 2012 R2 guest machine.
Whenever the Guest tries to access the internet, the hosts network is completely frozen.
The host machine is a dedicated server, so we have no physical access to it. The configuration is as follows:
The host has 1 NIC that uses dynamic IP adress (This is provided by a DHCP server from the datacenter in which the server is hosted). Hyper-V Extensible Virtual Switch and Microsoft Network Adapter Multiplexer Protocol are disable there. A vEthernet connection is set up in the host as well with the same properties except that the IP is static here (I'm using 192.168.1.1 for the host).
The virtual machine has one virtual network adapter where I set the IP to 192.168.1.10 and the default Gateway to the host machine (192.168.1.1). The virtual switch in Hyper-V for the guest is set to "Internal Network" with no VLAN.
I'm using "Routing and Remote Access" on the Host so I can set up a NAT for the guest VMs.
However, I can not access windows update or windows activation from the guest machine. Pings and HTTP (Internet Explorer) are working for the public internet. For example, windows update gives the following Error code: 8024401C
The problems are that I constantly lose network connectivity for about 5 to 10 seconds, and the host is no longer accessibly then (RDP, FTP and Ping all fail to the public IP adress of the host).
Can you tell me where I configured something wrong?