[  517.316862] bond0: (slave eth0): making interface the new active one
[  517.316942] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.479677] bond0: (slave eth0): Releasing backup interface
[  521.528563] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.710844] bond0: (slave eth0): Releasing backup interface