[  515.519016] bond0: (slave eth0): making interface the new active one
[  515.519091] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.774155] bond0: (slave eth0): Releasing backup interface
[  519.872718] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.065912] bond0: (slave eth0): Releasing backup interface
[  524.099945] bond0 (unregistering): Released all slaves