[  512.467195] bond0: (slave eth0): making interface the new active one
[  512.467261] bond0: (slave eth0): Enslaving as an active interface with an up link
[  516.693746] bond0: (slave eth0): Releasing backup interface
[  516.788720] bond0: (slave eth0): Enslaving as an active interface with an up link
[  520.979953] bond0: (slave eth0): Releasing backup interface
[  521.015945] bond0 (unregistering): Released all slaves