[  519.709309] bond0: (slave eth0): making interface the new active one
[  519.709376] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.929109] bond0: (slave eth0): Releasing backup interface
[  524.030796] bond0: (slave eth0): Enslaving as an active interface with an up link
[  528.222645] bond0: (slave eth0): Releasing backup interface
[  528.253055] bond0 (unregistering): Released all slaves