[  521.613108] bond0: (slave eth0): making interface the new active one
[  521.613178] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.771734] bond0: (slave eth0): Releasing backup interface
[  525.834732] bond0: (slave eth0): Enslaving as an active interface with an up link
[  529.994618] bond0: (slave eth0): Releasing backup interface
[  530.015483] bond0 (unregistering): Released all slaves