[  517.370509] bond0: (slave eth0): making interface the new active one
[  517.370620] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.622120] bond0: (slave eth0): Releasing backup interface
[  521.739162] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.913271] bond0: (slave eth0): Releasing backup interface
[  525.945890] bond0 (unregistering): Released all slaves