[  516.255915] bond0: (slave eth0): making interface the new active one
[  516.255978] bond0: (slave eth0): Enslaving as an active interface with an up link
[  520.391386] bond0: (slave eth0): Releasing backup interface
[  520.451746] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.619006] bond0: (slave eth0): Releasing backup interface