VM 1 - IP address: 172.16.11.50
VM 2 - IP address: 172.16.11.1
VM 3 - GNS 3 Server
I have a scenario where VM2 is running on GNS3 server, which is a VM within Hyper-V. I attempt to ping from VM 1 to VM 2. VM 1 sends out an ARP request for 172.16.11.1 and VM 2 receives it. VM 2 sends a reply which I see going out the interface of both VM 2 and subsequently VM 3 with the correct return MAC address. However, this reply never makes it to VM 1. When I listen on ethernet 1 or the corresponding virtual switch on WinServ 2012 I see the request go to VM2, but never see the reply which exits VM 3. No idea what Windows is doing in the background, but somewhere along the way it's dropping the ARP response and I can't for the life of me figure out why. Ideas?
