[  499.544796] bond0: (slave eth0): making interface the new active one
[  499.544873] bond0: (slave eth0): Enslaving as an active interface with an up link
[  503.688744] bond0: (slave eth0): Releasing backup interface
[  503.764224] bond0: (slave eth0): Enslaving as an active interface with an up link
[  507.915835] bond0: (slave eth0): Releasing backup interface
[  507.947232] bond0 (unregistering): Released all slaves