Today, I went and upgraded a Windows 2008 R2 machine to 2012 R2. I did a clean install and have never seen this problem before in this fashion. It is a HP 370G6 with an HP NC375I quad card. Only 1 adapter is in use, so it is not teamed.
After installing, none of my VM's will communicate to outside resources. I got the Windows 2012 R2 update package from HP dated 4/14. My virtual switch manager is set to Allow management operating system to share this adapter. The adapter
type is set to External. After playing around with 1 guest, I finally have it communicating with the rest of the network. However, my other guests will not. I have checked all IP's multiple times, no differences but the last octet.
I can not figure out what is allowing my 1 guest to now communicate, but the others to not. It is driving me crazy! I have tried adding and removing the adapter several times, and also tried using the Legacy NIC to no avail
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