[ 1637.985274] br0: port 1(dummy0) entered blocking state
[ 1637.985318] br0: port 1(dummy0) entered disabled state
[ 1637.985353] dummy0: entered allmulticast mode
[ 1637.985407] dummy0: entered promiscuous mode
[ 1637.988846] br0: port 1(dummy0) entered blocking state
[ 1637.988913] br0: port 1(dummy0) entered forwarding state
[ 1638.220896] dummy0: left allmulticast mode
[ 1638.220935] dummy0: left promiscuous mode
[ 1638.220975] br0: port 1(dummy0) entered disabled state