[ 1971.414052][T20804] br0: port 1(dummy0) entered blocking state
[ 1971.414288][T20804] br0: port 1(dummy0) entered disabled state
[ 1971.414517][T20804] dummy0: entered allmulticast mode
[ 1971.415638][T20804] dummy0: entered promiscuous mode
[ 1971.441445][T20805] br0: port 1(dummy0) entered blocking state
[ 1971.441710][T20805] br0: port 1(dummy0) entered forwarding state
[ 1973.180779][   T12] dummy0: left allmulticast mode
[ 1973.181102][   T12] dummy0: left promiscuous mode
[ 1973.181359][   T12] br0: port 1(dummy0) entered disabled state