[ 1901.444064] br0: port 1(dummy0) entered blocking state
[ 1901.444099] br0: port 1(dummy0) entered disabled state
[ 1901.444132] dummy0: entered allmulticast mode
[ 1901.444199] dummy0: entered promiscuous mode
[ 1901.447392] br0: port 1(dummy0) entered blocking state
[ 1901.447416] br0: port 1(dummy0) entered forwarding state
[ 1901.654470] dummy0: left allmulticast mode
[ 1901.654501] dummy0: left promiscuous mode
[ 1901.654548] br0: port 1(dummy0) entered disabled state