[ 1903.849399] br0: port 1(dummy0) entered blocking state
[ 1903.849426] br0: port 1(dummy0) entered disabled state
[ 1903.849450] dummy0: entered allmulticast mode
[ 1903.849485] dummy0: entered promiscuous mode
[ 1903.852651] br0: port 1(dummy0) entered blocking state
[ 1903.852676] br0: port 1(dummy0) entered forwarding state
[ 1904.100701] dummy0: left allmulticast mode
[ 1904.100727] dummy0: left promiscuous mode
[ 1904.100748] br0: port 1(dummy0) entered disabled state