[  503.013912] bond0: (slave eth0): making interface the new active one
[  503.013995] bond0: (slave eth0): Enslaving as an active interface with an up link
[  507.216349] bond0: (slave eth0): Releasing backup interface
[  507.292595] bond0: (slave eth0): Enslaving as an active interface with an up link
[  511.449771] bond0: (slave eth0): Releasing backup interface