[  521.758288] bond0: (slave eth0): making interface the new active one
[  521.758363] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.976518] bond0: (slave eth0): Releasing backup interface
[  526.092354] bond0: (slave eth0): Enslaving as an active interface with an up link
[  530.265016] bond0: (slave eth0): Releasing backup interface
[  530.294886] bond0 (unregistering): Released all slaves