[  501.142817] bond0: (slave eth0): making interface the new active one
[  501.142908] bond0: (slave eth0): Enslaving as an active interface with an up link
[  505.297733] bond0: (slave eth0): Releasing backup interface
[  505.357406] bond0: (slave eth0): Enslaving as an active interface with an up link
[  509.526366] bond0: (slave eth0): Releasing backup interface
[  509.553316] bond0 (unregistering): Released all slaves