[ 1641.055261] br0: port 1(dummy0) entered blocking state
[ 1641.055299] br0: port 1(dummy0) entered disabled state
[ 1641.055334] dummy0: entered allmulticast mode
[ 1641.055390] dummy0: entered promiscuous mode
[ 1641.058207] br0: port 1(dummy0) entered blocking state
[ 1641.058243] br0: port 1(dummy0) entered forwarding state
[ 1641.248760] dummy0: left allmulticast mode
[ 1641.248795] dummy0: left promiscuous mode
[ 1641.248857] br0: port 1(dummy0) entered disabled state