[  517.417723] bond0: (slave eth0): making interface the new active one
[  517.417792] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.612336] bond0: (slave eth0): Releasing backup interface
[  521.693050] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.841852] bond0: (slave eth0): Releasing backup interface