[ 1918.250515][ T3402] br0: port 1(dummy0) entered blocking state
[ 1918.250769][ T3402] br0: port 1(dummy0) entered disabled state
[ 1918.250996][ T3402] dummy0: entered allmulticast mode
[ 1918.252296][ T3402] dummy0: entered promiscuous mode
[ 1918.277831][ T3403] br0: port 1(dummy0) entered blocking state
[ 1918.278109][ T3403] br0: port 1(dummy0) entered forwarding state
[ 1920.290188][   T72] dummy0: left allmulticast mode
[ 1920.290473][   T72] dummy0: left promiscuous mode
[ 1920.290682][   T72] br0: port 1(dummy0) entered disabled state