[ 1804.147467] br0: port 1(dummy0) entered blocking state
[ 1804.147508] br0: port 1(dummy0) entered disabled state
[ 1804.147545] dummy0: entered allmulticast mode
[ 1804.147591] dummy0: entered promiscuous mode
[ 1804.150419] br0: port 1(dummy0) entered blocking state
[ 1804.150480] br0: port 1(dummy0) entered forwarding state
[ 1804.335777] dummy0: left allmulticast mode
[ 1804.335801] dummy0: left promiscuous mode
[ 1804.335829] br0: port 1(dummy0) entered disabled state