[  520.588327] bond0: (slave eth0): making interface the new active one
[  520.588397] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.742262] bond0: (slave eth0): Releasing backup interface
[  524.798616] bond0: (slave eth0): Enslaving as an active interface with an up link
[  528.967319] bond0: (slave eth0): Releasing backup interface
[  528.990122] bond0 (unregistering): Released all slaves