[  516.610455] bond0: (slave eth0): making interface the new active one
[  516.610529] bond0: (slave eth0): Enslaving as an active interface with an up link
[  520.812041] bond0: (slave eth0): Releasing backup interface
[  520.930554] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.169312] bond0: (slave eth0): Releasing backup interface