[  517.055141] bond0: (slave eth0): making interface the new active one
[  517.055208] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.244467] bond0: (slave eth0): Releasing backup interface
[  521.357222] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.538885] bond0: (slave eth0): Releasing backup interface