OK, so this is weird.
Once physical nic (onboard, Intel I219-V), and one virtual switch enabled from that. Set so the host can share networking. Every time I boot Windows 10x64, I have no networking until I disable and re-enable the virtual switch. All the settings on it are right, it just needs an on/off to spring to life. Any ideas?
Until I disable/re-enable the switch, the system event log fills with
Hyper-V-Vm-Switch Event Id 25 The MAC address 40-8D-5C-50-5D-7C has moved from port C37F171C-9D82-470F-BCB5-80FC6160C33C (Friendly Name: External) to port 30CA8B90-F073-47EB-89EC-764EEB07E8F8 (Friendly Name: External_External).
Hyper-V-Vm-Switch Event Id 25 The MAC address 40-8D-5C-50-5D-7C has moved from port 30CA8B90-F073-47EB-89EC-764EEB07E8F8 (Friendly Name: External_External) to port C37F171C-9D82-470F-BCB5-80FC6160C33C (Friendly Name: External).
That's the MAC address of my external Virtual switch. It continuously flips between those two entries. Why would the MAC address be flapping from port to port like that?
Then, I disable/re-enable the vSwitch and
Hyper-V-VmSwitch EventID 7 Miniport NIC 6D97AB55-966A-4BAD-9664-9DB3B7D17B4E (Friendly Name: External) successfully initialized.
Event 5 Miniport NIC 6D97AB55-966A-4BAD-9664-9DB3B7D17B4E (Friendly Name: ) successfully enabled
Event 5 Miniport NIC 7ADB06B9-C08D-4993-A8B7-78B2EF4A0B89 (Friendly Name: ) successfully enabled
And that's it - I have networking again and the event log behaves itself.
Any ideas? (vSwitch is of course set to allow host networking)
(Saw this post, but I only have one physical and no NLB: https://social.technet.microsoft.com/Forums/windowsserver/en-US/681708f1-8fa7-4fcf-b6fc-5c56788d6dfa/hypervvmswitch-event-25-continuously. Apart from that, it's spot in in terms of number of entries)
A