[  504.003132] bond0: (slave eth0): making interface the new active one
[  504.003224] bond0: (slave eth0): Enslaving as an active interface with an up link
[  508.183612] bond0: (slave eth0): Releasing backup interface
[  508.271502] bond0: (slave eth0): Enslaving as an active interface with an up link
[  512.475456] bond0: (slave eth0): Releasing backup interface
[  512.507448] bond0 (unregistering): Released all slaves