[  515.544954] bond0: (slave eth0): making interface the new active one
[  515.545075] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.699106] bond0: (slave eth0): Releasing backup interface
[  519.780005] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.929780] bond0: (slave eth0): Releasing backup interface
[  523.966430] bond0 (unregistering): Released all slaves