[ 1681.304051] br0: port 1(dummy0) entered blocking state
[ 1681.304095] br0: port 1(dummy0) entered disabled state
[ 1681.304127] dummy0: entered allmulticast mode
[ 1681.304186] dummy0: entered promiscuous mode
[ 1681.306624] br0: port 1(dummy0) entered blocking state
[ 1681.306684] br0: port 1(dummy0) entered forwarding state
[ 1681.496273] dummy0: left allmulticast mode
[ 1681.496310] dummy0: left promiscuous mode
[ 1681.496392] br0: port 1(dummy0) entered disabled state