[  521.290530] bond0: (slave eth0): making interface the new active one
[  521.290667] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.461006] bond0: (slave eth0): Releasing backup interface
[  525.539770] bond0: (slave eth0): Enslaving as an active interface with an up link
[  529.687377] bond0: (slave eth0): Releasing backup interface
[  529.719341] bond0 (unregistering): Released all slaves