[  521.053490] bond0: (slave eth0): making interface the new active one
[  521.053579] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.259266] bond0: (slave eth0): Releasing backup interface
[  525.325374] bond0: (slave eth0): Enslaving as an active interface with an up link
[  529.487111] bond0: (slave eth0): Releasing backup interface
[  529.525127] bond0 (unregistering): Released all slaves