[  515.138864] bond0: (slave eth0): making interface the new active one
[  515.138945] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.313561] bond0: (slave eth0): Releasing backup interface
[  519.389525] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.542441] bond0: (slave eth0): Releasing backup interface
[  523.582373] bond0 (unregistering): Released all slaves