[ 1959.297800][ T1723] br0: port 1(dummy0) entered blocking state
[ 1959.297989][ T1723] br0: port 1(dummy0) entered disabled state
[ 1959.298565][ T1723] dummy0: entered allmulticast mode
[ 1959.299803][ T1723] dummy0: entered promiscuous mode
[ 1959.333751][ T1724] br0: port 1(dummy0) entered blocking state
[ 1959.333932][ T1724] br0: port 1(dummy0) entered forwarding state
[ 1961.230763][   T12] dummy0: left allmulticast mode
[ 1961.230957][   T12] dummy0: left promiscuous mode
[ 1961.231196][   T12] br0: port 1(dummy0) entered disabled state