[ 1755.207294] br0: port 1(dummy0) entered blocking state
[ 1755.207337] br0: port 1(dummy0) entered disabled state
[ 1755.207377] dummy0: entered allmulticast mode
[ 1755.207429] dummy0: entered promiscuous mode
[ 1755.210929] br0: port 1(dummy0) entered blocking state
[ 1755.210995] br0: port 1(dummy0) entered forwarding state
[ 1755.474583] dummy0: left allmulticast mode
[ 1755.474620] dummy0: left promiscuous mode
[ 1755.474649] br0: port 1(dummy0) entered disabled state