[ 1602.547802] br0: port 1(dummy0) entered blocking state
[ 1602.547843] br0: port 1(dummy0) entered disabled state
[ 1602.547879] dummy0: entered allmulticast mode
[ 1602.547928] dummy0: entered promiscuous mode
[ 1602.550906] br0: port 1(dummy0) entered blocking state
[ 1602.550938] br0: port 1(dummy0) entered forwarding state
[ 1602.756117] dummy0: left allmulticast mode
[ 1602.756218] dummy0: left promiscuous mode
[ 1602.756254] br0: port 1(dummy0) entered disabled state