[  513.995044] bond0: (slave eth0): making interface the new active one
[  513.995140] bond0: (slave eth0): Enslaving as an active interface with an up link
[  518.231442] bond0: (slave eth0): Releasing backup interface
[  518.331414] bond0: (slave eth0): Enslaving as an active interface with an up link
[  522.522157] bond0: (slave eth0): Releasing backup interface