[  519.823508] bond0: (slave eth0): making interface the new active one
[  519.823587] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.977398] bond0: (slave eth0): Releasing backup interface
[  524.054988] bond0: (slave eth0): Enslaving as an active interface with an up link
[  528.205871] bond0: (slave eth0): Releasing backup interface
[  528.243879] bond0 (unregistering): Released all slaves