[  520.598926] bond0: (slave eth0): making interface the new active one
[  520.599009] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.827622] bond0: (slave eth0): Releasing backup interface
[  524.948650] bond0: (slave eth0): Enslaving as an active interface with an up link
[  529.119320] bond0: (slave eth0): Releasing backup interface
[  529.146965] bond0 (unregistering): Released all slaves