[ 1874.600655] br0: port 1(dummy0) entered blocking state
[ 1874.600687] br0: port 1(dummy0) entered disabled state
[ 1874.600710] dummy0: entered allmulticast mode
[ 1874.600749] dummy0: entered promiscuous mode
[ 1874.604281] br0: port 1(dummy0) entered blocking state
[ 1874.604330] br0: port 1(dummy0) entered forwarding state
[ 1874.869471] dummy0: left allmulticast mode
[ 1874.869509] dummy0: left promiscuous mode
[ 1874.869588] br0: port 1(dummy0) entered disabled state