[ 1756.370809] br0: port 1(dummy0) entered blocking state
[ 1756.370842] br0: port 1(dummy0) entered disabled state
[ 1756.370878] dummy0: entered allmulticast mode
[ 1756.370925] dummy0: entered promiscuous mode
[ 1756.373776] br0: port 1(dummy0) entered blocking state
[ 1756.373808] br0: port 1(dummy0) entered forwarding state
[ 1756.559240] dummy0: left allmulticast mode
[ 1756.559269] dummy0: left promiscuous mode
[ 1756.559294] br0: port 1(dummy0) entered disabled state