Description of problem:
When running a qemu virtual machine with at least one bridged network interface to a physical wired ethernet interface, unplugging and later replugging the cable restores connectivity on the host but not the guest.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Install a qemu virtual machine with kvm support. Operating system does not matter. Configure a bridged virtual interface to a physical wired interface.
2. Check that both host and guest can ping somewhere through the interface.
3. Unplug the network cable.
4. Check that both host and guest lost network connectivity through the wired interface. This is expected.
5. Replug the network cable.
Host regains connectivity through the network interface, verified with ping. However, guest is still unable to communicate through bridged interface.
Both host and guest should regain connectivity shortly after the network cable is replugged.
Rebooting the virtual machine within the same qemu process does NOT fix the issue. However, shutting down the machine, and then restarting it with a different qemu process restores connectivity.
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Does this still reproduce with fedora 23?
Fedora 21 changed to end-of-life (EOL) status on 2015-12-01. Fedora 21 is
no longer maintained, which means that it will not receive any further
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