@Yaroslav Close! VM has no passed through nics, all of them are virtuals provided by Proxmox. They're being provided Virtio nics, not e1000s. The issue seems to be the number, honestly. Any more than 2 nics, machine doesn't like it, sits on the "Management Service Starting" on the web gui....

Title basically covers it all. Vm created with the free license. Imported, boot works fine first time with 1 Nic. Set management IP, golden. Shut down, add second nic. Boots fine. Set IP, golden. Shut down, add third nic. No dice. Gui sits on management service starting. If you hit the console, you ...