i found a strange behavior of network connections for KVM-guests on a Fedora33-Desktop host.
I set up a network bridge with nmcli and add my usb-c dock interface as a slave to it.
After that i installed a Debian-KVM-guest with virt-manager with the netinst-image.
The installation runs smoothly and no problems appear. Finaly with the running VM it looses the network-connection randomly for a minute or more to finally appear again for a few seconds.
On my Fedora host the network connection over the bridge runs smoothly without any issues.
STP is disabled, the guest has its own static ip and everything seems as it should work.
The funny thing is, that the logs of NetworkManager (journalctl -u NetworkManager) on my Fedora machine show, that the connection seems to re-initiate every minute or so, but nothing feels like it really does.
Anyone had the same or a similar issue?
I’m usually a Debian user/administrator, and only use Fedora, cause it runs on my Thinkpad without any issues.