[ 2320.649008][ T2293] br0: port 1(dummy0) entered blocking state
[ 2320.649207][ T2293] br0: port 1(dummy0) entered disabled state
[ 2320.649369][ T2293] dummy0: entered allmulticast mode
[ 2320.650373][ T2293] dummy0: entered promiscuous mode
[ 2320.680628][ T2294] br0: port 1(dummy0) entered blocking state
[ 2320.680952][ T2294] br0: port 1(dummy0) entered forwarding state
[ 2323.066637][   T12] dummy0: left allmulticast mode
[ 2323.067535][   T12] dummy0: left promiscuous mode
[ 2323.067897][   T12] br0: port 1(dummy0) entered disabled state