[ 1749.407292] br0: port 1(dummy0) entered blocking state
[ 1749.407367] br0: port 1(dummy0) entered disabled state
[ 1749.407437] dummy0: entered allmulticast mode
[ 1749.407527] dummy0: entered promiscuous mode
[ 1749.411131] br0: port 1(dummy0) entered blocking state
[ 1749.411163] br0: port 1(dummy0) entered forwarding state
[ 1749.684852] dummy0: left allmulticast mode
[ 1749.684890] dummy0: left promiscuous mode
[ 1749.684923] br0: port 1(dummy0) entered disabled state