ll slaves
[  722.126551] 8021q: adding VLAN 0 to HW filter on device bond0
[  722.129332] bond0: (slave veth0): Enslaving as a backup interface with a down link
[  722.132092] bond0: (slave veth1): Enslaving as a backup interface with a down link
[  722.134820] br0: port 1(veth0) entered blocking state
[  722.134858] br0: port 1(veth0) entered disabled state
[  722.134887] veth0: entered allmulticast mode
[  722.134937] veth0: entered promiscuous mode
[  722.137623] br0: port 2(veth1) entered blocking state
[  722.137661] br0: port 2(veth1) entered disabled state
[  722.137695] veth1: entered allmulticast mode
[  722.137748] veth1: entered promiscuous mode
[  722.410457] br0: port 1(veth0) entered blocking state
[  722.410527] br0: port 1(veth0) entered forwarding state
[  722.410597] br0: port 2(veth1) entered blocking state
[  722.410634] br0: port 2(veth1) entered forwarding state
[  724.155446] bond0: (slave veth1): link status definitely up
[  724.155503] bond0: (slave veth1): making interface the new active one
[  724.155555] bond0: active interface up!
[  724.241874] veth1: left allmulticast mode
[  724.241918] veth1: left promiscuous mode
[  724.241958] br0: port 2(veth1) entered disabled state
[  724.242048] veth0: left allmulticast mode
[  724.242078] veth0: left promiscuous mode
[  724.242106] br0: port 1(veth0) entered disabled state
[  724.256552] bond0: (slave veth1): Releasing backup interface
[  724.264509] bond0: (slave veth0): Releasing backup interface
[  724.289516] bond0 (unregistering): Released all slaves