[ 1820.630582] br0: port 1(dummy0) entered blocking state
[ 1820.630639] br0: port 1(dummy0) entered disabled state
[ 1820.630675] dummy0: entered allmulticast mode
[ 1820.630731] dummy0: entered promiscuous mode
[ 1820.634446] br0: port 1(dummy0) entered blocking state
[ 1820.634515] br0: port 1(dummy0) entered forwarding state
[ 1820.892108] dummy0: left allmulticast mode
[ 1820.892154] dummy0: left promiscuous mode
[ 1820.892189] br0: port 1(dummy0) entered disabled state