[ 1710.147452] br0: port 1(dummy0) entered blocking state
[ 1710.147488] br0: port 1(dummy0) entered disabled state
[ 1710.147525] dummy0: entered allmulticast mode
[ 1710.147573] dummy0: entered promiscuous mode
[ 1710.150494] br0: port 1(dummy0) entered blocking state
[ 1710.150562] br0: port 1(dummy0) entered forwarding state
[ 1710.338010] dummy0: left allmulticast mode
[ 1710.338037] dummy0: left promiscuous mode
[ 1710.338064] br0: port 1(dummy0) entered disabled state