[ 1560.751466] br0: port 1(dummy0) entered blocking state
[ 1560.751567] br0: port 1(dummy0) entered disabled state
[ 1560.751617] dummy0: entered allmulticast mode
[ 1560.751681] dummy0: entered promiscuous mode
[ 1560.754673] br0: port 1(dummy0) entered blocking state
[ 1560.754725] br0: port 1(dummy0) entered forwarding state
[ 1560.937081] dummy0: left allmulticast mode
[ 1560.937155] dummy0: left promiscuous mode
[ 1560.937186] br0: port 1(dummy0) entered disabled state