[ 1647.199358] br0: port 1(dummy0) entered blocking state
[ 1647.199405] br0: port 1(dummy0) entered disabled state
[ 1647.199446] dummy0: entered allmulticast mode
[ 1647.199500] dummy0: entered promiscuous mode
[ 1647.202391] br0: port 1(dummy0) entered blocking state
[ 1647.202455] br0: port 1(dummy0) entered forwarding state
[ 1647.398188] dummy0: left allmulticast mode
[ 1647.398242] dummy0: left promiscuous mode
[ 1647.398271] br0: port 1(dummy0) entered disabled state