[ 2148.213279][ T6723] br0: port 1(dummy0) entered blocking state
[ 2148.213588][ T6723] br0: port 1(dummy0) entered disabled state
[ 2148.213874][ T6723] dummy0: entered allmulticast mode
[ 2148.215254][ T6723] dummy0: entered promiscuous mode
[ 2148.252381][ T6724] br0: port 1(dummy0) entered blocking state
[ 2148.252836][ T6724] br0: port 1(dummy0) entered forwarding state
[ 2150.744035][   T71] dummy0: left allmulticast mode
[ 2150.744527][   T71] dummy0: left promiscuous mode
[ 2150.744870][   T71] br0: port 1(dummy0) entered disabled state