[ 1876.977288][ T4570] br0: port 1(dummy0) entered blocking state
[ 1876.977964][ T4570] br0: port 1(dummy0) entered disabled state
[ 1876.978130][ T4570] dummy0: entered allmulticast mode
[ 1876.979071][ T4570] dummy0: entered promiscuous mode
[ 1877.006319][ T4571] br0: port 1(dummy0) entered blocking state
[ 1877.006741][ T4571] br0: port 1(dummy0) entered forwarding state
[ 1878.992579][   T12] dummy0: left allmulticast mode
[ 1878.993305][   T12] dummy0: left promiscuous mode
[ 1878.993744][   T12] br0: port 1(dummy0) entered disabled state