[ 1997.358736][T12998] br0: port 1(dummy0) entered blocking state
[ 1997.358982][T12998] br0: port 1(dummy0) entered disabled state
[ 1997.359208][T12998] dummy0: entered allmulticast mode
[ 1997.360332][T12998] dummy0: entered promiscuous mode
[ 1997.385680][T12999] br0: port 1(dummy0) entered blocking state
[ 1997.385968][T12999] br0: port 1(dummy0) entered forwarding state
[ 1999.223025][   T12] dummy0: left allmulticast mode
[ 1999.224298][   T12] dummy0: left promiscuous mode
[ 1999.224733][   T12] br0: port 1(dummy0) entered disabled state