[  519.120791] bond0: (slave eth0): making interface the new active one
[  519.120900] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.356553] bond0: (slave eth0): Releasing backup interface
[  523.467061] bond0: (slave eth0): Enslaving as an active interface with an up link
[  527.641060] bond0: (slave eth0): Releasing backup interface
[  527.678015] bond0 (unregistering): Released all slaves