[ 1831.227725] br0: port 1(dummy0) entered blocking state
[ 1831.227764] br0: port 1(dummy0) entered disabled state
[ 1831.227786] dummy0: entered allmulticast mode
[ 1831.227837] dummy0: entered promiscuous mode
[ 1831.231597] br0: port 1(dummy0) entered blocking state
[ 1831.231630] br0: port 1(dummy0) entered forwarding state
[ 1831.513181] dummy0: left allmulticast mode
[ 1831.513223] dummy0: left promiscuous mode
[ 1831.513250] br0: port 1(dummy0) entered disabled state