[  509.638469] bond0: (slave eth0): making interface the new active one
[  509.638543] bond0: (slave eth0): Enslaving as an active interface with an up link
[  513.878544] bond0: (slave eth0): Releasing backup interface
[  513.992898] bond0: (slave eth0): Enslaving as an active interface with an up link
[  518.170043] bond0: (slave eth0): Releasing backup interface
[  518.194902] bond0 (unregistering): Released all slaves