[  517.425233] bond0: (slave eth0): making interface the new active one
[  517.425322] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.636676] bond0: (slave eth0): Releasing backup interface
[  521.722388] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.920050] bond0: (slave eth0): Releasing backup interface
[  525.955093] bond0 (unregistering): Released all slaves