[ 1704.550091] br0: port 1(dummy0) entered blocking state
[ 1704.550135] br0: port 1(dummy0) entered disabled state
[ 1704.550168] dummy0: entered allmulticast mode
[ 1704.550222] dummy0: entered promiscuous mode
[ 1704.553199] br0: port 1(dummy0) entered blocking state
[ 1704.553264] br0: port 1(dummy0) entered forwarding state
[ 1704.749708] dummy0: left allmulticast mode
[ 1704.749740] dummy0: left promiscuous mode
[ 1704.749767] br0: port 1(dummy0) entered disabled state