[ 1663.009784] br0: port 1(dummy0) entered blocking state
[ 1663.009827] br0: port 1(dummy0) entered disabled state
[ 1663.009866] dummy0: entered allmulticast mode
[ 1663.009920] dummy0: entered promiscuous mode
[ 1663.012438] br0: port 1(dummy0) entered blocking state
[ 1663.012481] br0: port 1(dummy0) entered forwarding state
[ 1663.183842] dummy0: left allmulticast mode
[ 1663.183875] dummy0: left promiscuous mode
[ 1663.183902] br0: port 1(dummy0) entered disabled state