[  521.410374] bond0: (slave eth0): making interface the new active one
[  521.410432] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.593558] bond0: (slave eth0): Releasing backup interface
[  525.697347] bond0: (slave eth0): Enslaving as an active interface with an up link
[  529.878001] bond0: (slave eth0): Releasing backup interface
[  529.914901] bond0 (unregistering): Released all slaves