[  515.025273] bond0: (slave eth0): making interface the new active one
[  515.025358] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.255342] bond0: (slave eth0): Releasing backup interface
[  519.354692] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.546096] bond0: (slave eth0): Releasing backup interface
[  523.572911] bond0 (unregistering): Released all slaves