[ 1925.079254][ T7020] br0: port 1(dummy0) entered blocking state
[ 1925.079495][ T7020] br0: port 1(dummy0) entered disabled state
[ 1925.079705][ T7020] dummy0: entered allmulticast mode
[ 1925.081083][ T7020] dummy0: entered promiscuous mode
[ 1925.109665][ T7021] br0: port 1(dummy0) entered blocking state
[ 1925.110174][ T7021] br0: port 1(dummy0) entered forwarding state
[ 1927.087707][   T12] dummy0: left allmulticast mode
[ 1927.088396][   T12] dummy0: left promiscuous mode
[ 1927.088674][   T12] br0: port 1(dummy0) entered disabled state