[18.04] No network after moving VM from Hyper-V 2012 to 2019

[Helmut Schneider]

Am 04.11.2019 um 10:42 schrieb Helmut Schneider:

> I moved an Ubuntu 18.04 VM from Hyper-V 2012 to Hyper-V 2019 and changed
> the network interfaces to teaming on Windows. Now Ubuntu neither brings
> the interface up on boot nor sets an IP (static using netplan) . A
> Debian 9.11 machine and a freshly installed 18.04 do fine.
> 
> Where do I start?

I checked dmesg, found try regarding netplan, ran netplan try, found a 
faulty xml, removed it, restarted, network works again.