Comment 9 for bug 1785171

Obviously, there's others having issues with Ubuntu Server 18.04 and their network connectivity.

I prefer to use NetworkManager to control my wifi and wired Ethernet network interfaces. Ubuntu has a different view it seems (prefer networkd for wired interface, NetworkManager for wifi it seems), but there should be no bugs for those that choose to configure their systems to use NetworkManager. My networking hardware with NetworkManager is rock solid on CentOS Server 7.4, so I don't get why the network connectivity using NetworkManager is not stable for Ubuntu Server 18.04?

Please see the following string from this recent Ubuntu bug ticket opened with regards to the wired network interface not working properly with Ubuntu 18.04 (their is is mostly similar, though their road is slightly different in figuring out something is not right with Ubuntu 18.04 server and their network interface).

To sum this long bug post, the Ubuntu Server 18.04 implementation of NetworkManager is maybe not preferred, but it should be working perfectly on my Intel i219-v onboard network adapter.

https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1772859

There's a bug somewhere (e1000e driver, Ubuntu 18.04 implementation of NetworkManager, etc.) given the poor/strange performance I'm seeing on multiple fronts. Intermittent loss of internet connectivity and very, very poor download performance across my setup of the Intel i219-V onboard NI and the implementation of Netplan/NetworkManager on the Ubuntu Server 18.04 OS.

If it's not a bug (meaning a configuration like mine is proven 99.9999% stable using the scientific method through verification in the lab), then let's get the proper NetworkManager configuration information documented in detail on the Ubuntu wiki, so this same issue is not be brought up over and over again.

Please let me know if there is more help and info I can provide to get to this fixed and working properly as it should be.