[ 1793.167498] br0: port 1(dummy0) entered blocking state
[ 1793.167537] br0: port 1(dummy0) entered disabled state
[ 1793.167570] dummy0: entered allmulticast mode
[ 1793.167626] dummy0: entered promiscuous mode
[ 1793.171021] br0: port 1(dummy0) entered blocking state
[ 1793.171051] br0: port 1(dummy0) entered forwarding state
[ 1793.411302] dummy0: left allmulticast mode
[ 1793.411347] dummy0: left promiscuous mode
[ 1793.411392] br0: port 1(dummy0) entered disabled state