[  521.111025] bond0: (slave eth0): making interface the new active one
[  521.111097] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.261400] bond0: (slave eth0): Releasing backup interface
[  525.330898] bond0: (slave eth0): Enslaving as an active interface with an up link
[  529.490759] bond0: (slave eth0): Releasing backup interface