[  516.070957] bond0: (slave eth0): making interface the new active one
[  516.071041] bond0: (slave eth0): Enslaving as an active interface with an up link
[  520.279019] bond0: (slave eth0): Releasing backup interface
[  520.371406] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.567057] bond0: (slave eth0): Releasing backup interface
[  524.594002] bond0 (unregistering): Released all slaves