[  515.261701] bond0: (slave eth0): making interface the new active one
[  515.261835] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.526262] bond0: (slave eth0): Releasing backup interface
[  519.665503] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.871284] bond0: (slave eth0): Releasing backup interface
[  523.899093] bond0 (unregistering): Released all slaves