[  518.393913] bond0: (slave eth0): making interface the new active one
[  518.394009] bond0: (slave eth0): Enslaving as an active interface with an up link
[  522.575919] bond0: (slave eth0): Releasing backup interface
[  522.670426] bond0: (slave eth0): Enslaving as an active interface with an up link
[  526.864929] bond0: (slave eth0): Releasing backup interface
[  526.891712] bond0 (unregistering): Released all slaves