[  520.221967] bond0: (slave eth0): making interface the new active one
[  520.222105] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.427567] bond0: (slave eth0): Releasing backup interface
[  524.501359] bond0: (slave eth0): Enslaving as an active interface with an up link
[  528.649999] bond0: (slave eth0): Releasing backup interface
[  528.682932] bond0 (unregistering): Released all slaves