[  521.949462] bond0: (slave eth0): making interface the new active one
[  521.949553] bond0: (slave eth0): Enslaving as an active interface with an up link
[  526.154076] bond0: (slave eth0): Releasing backup interface
[  526.222662] bond0: (slave eth0): Enslaving as an active interface with an up link
[  530.380480] bond0: (slave eth0): Releasing backup interface
[  530.402429] bond0 (unregistering): Released all slaves