[  520.378969] bond0: (slave eth0): making interface the new active one
[  520.379041] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.562309] bond0: (slave eth0): Releasing backup interface
[  524.627663] bond0: (slave eth0): Enslaving as an active interface with an up link
[  528.787505] bond0: (slave eth0): Releasing backup interface
[  528.809451] bond0 (unregistering): Released all slaves