[ 1899.308694] br0: port 1(dummy0) entered blocking state
[ 1899.308746] br0: port 1(dummy0) entered disabled state
[ 1899.308782] dummy0: entered allmulticast mode
[ 1899.308842] dummy0: entered promiscuous mode
[ 1899.312763] br0: port 1(dummy0) entered blocking state
[ 1899.312790] br0: port 1(dummy0) entered forwarding state
[ 1899.595053] dummy0: left allmulticast mode
[ 1899.595092] dummy0: left promiscuous mode
[ 1899.595179] br0: port 1(dummy0) entered disabled state