[ 1902.892188] br0: port 1(dummy0) entered blocking state
[ 1902.892229] br0: port 1(dummy0) entered disabled state
[ 1902.892261] dummy0: entered allmulticast mode
[ 1902.892318] dummy0: entered promiscuous mode
[ 1902.896775] br0: port 1(dummy0) entered blocking state
[ 1902.896839] br0: port 1(dummy0) entered forwarding state
[ 1903.197291] dummy0: left allmulticast mode
[ 1903.197324] dummy0: left promiscuous mode
[ 1903.197362] br0: port 1(dummy0) entered disabled state