Can't start KVM guest: "network 'default' is not active"

I use Virtual Machine Manager (virt-manager).

• Host: Ubuntu 18.04.
• Guest: Windows.

After first shutdown I can't start it. I get this error message:

Error starting domain: Requested operation is not valid: network 'default' is not active
Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/asyncjob.py", line 89, in cb_wrapper callback(asyncjob, *args, **kwargs) File "/usr/share/virt-manager/virtManager/asyncjob.py", line 125, in tmpcb callback(*args, **kwargs) File "/usr/share/virt-manager/virtManager/libvirtobject.py", line 82, in newfn

1 Answer

First, confirm that the default network is indeed inactive:

sudo virsh net-list --all

If so, start the default network:

sudo virsh net-start default 

Run the first command line again to see if it worked.