[  500.632879] bond0: (slave eth0): making interface the new active one
[  500.632997] bond0: (slave eth0): Enslaving as an active interface with an up link
[  504.789204] bond0: (slave eth0): Releasing backup interface
[  504.873740] bond0: (slave eth0): Enslaving as an active interface with an up link
[  509.015505] bond0: (slave eth0): Releasing backup interface
[  509.041426] bond0 (unregistering): Released all slaves