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I have an ethernet connection to my Ubuntu 20.04 installation. It used to use as an IP address assigned via DHCP from my router. The router has the mac address in its table of pre-assigned IP addresses.

Inside the Ubuntu machine I am running KVM and one of my KVM VMs has a virtual NIC which uses BR0, my pre-created bridge. This was setup in /etc/netplan/01-network-manager-all.yaml

I want the KVM VM to use I have also set this up in my router as a static IP address linked to the MAC address of the VM NIC.

I have netplan, and the renderer was networkd. However I recently moved my router to (it was .2) and now my KVM VM no longer sees the Internet. I assume this is because the gateway is still set as and hence it has no access and no DNS lookup.

I decided to change netplan to use NetworkManager and changed that one line and applied. The result is I have lost (the ubuntu server) but can still see and access .22, but still have no internet access.
I assume I am going to have to physically plug in a keyboard, mouse and monitor to fix this.

I also have no idea how I use networkmanager. Any easy guide on how to have a bridge to my physical nic on the host, where the bridge has its own separate IP address?


01-13-2022, 10:26 PM
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