[  514.146591] bond0: (slave eth0): making interface the new active one
[  514.146697] bond0: (slave eth0): Enslaving as an active interface with an up link
[  518.351839] bond0: (slave eth0): Releasing backup interface
[  518.440654] bond0: (slave eth0): Enslaving as an active interface with an up link
[  522.650468] bond0: (slave eth0): Releasing backup interface