[  515.061225] bond0: (slave eth0): making interface the new active one
[  515.061318] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.253886] bond0: (slave eth0): Releasing backup interface
[  519.357224] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.544858] bond0: (slave eth0): Releasing backup interface
[  523.574842] bond0 (unregistering): Released all slaves