[ 1903.042559][T15602] br0: port 1(dummy0) entered blocking state
[ 1903.042823][T15602] br0: port 1(dummy0) entered disabled state
[ 1903.043055][T15602] dummy0: entered allmulticast mode
[ 1903.044446][T15602] dummy0: entered promiscuous mode
[ 1903.072960][T15603] br0: port 1(dummy0) entered blocking state
[ 1903.073236][T15603] br0: port 1(dummy0) entered forwarding state
[ 1904.814247][   T12] dummy0: left allmulticast mode
[ 1904.814520][   T12] dummy0: left promiscuous mode
[ 1904.814736][   T12] br0: port 1(dummy0) entered disabled state