[  518.301711] bond0: (slave eth0): making interface the new active one
[  518.301808] bond0: (slave eth0): Enslaving as an active interface with an up link
[  522.524587] bond0: (slave eth0): Releasing backup interface
[  522.634680] bond0: (slave eth0): Enslaving as an active interface with an up link
[  526.811888] bond0: (slave eth0): Releasing backup interface
[  526.845822] bond0 (unregistering): Released all slaves