[  515.079256] bond0: (slave eth0): making interface the new active one
[  515.079324] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.259590] bond0: (slave eth0): Releasing backup interface
[  519.389470] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.616890] bond0: (slave eth0): Releasing backup interface
[  523.646891] bond0 (unregistering): Released all slaves