[  518.255693] bond0: (slave eth0): making interface the new active one
[  518.255796] bond0: (slave eth0): Enslaving as an active interface with an up link
[  522.461441] bond0: (slave eth0): Releasing backup interface
[  522.582994] bond0: (slave eth0): Enslaving as an active interface with an up link
[  526.745010] bond0: (slave eth0): Releasing backup interface
[  526.773960] bond0 (unregistering): Released all slaves