[ 1603.240744] br0: port 1(dummy0) entered blocking state
[ 1603.240785] br0: port 1(dummy0) entered disabled state
[ 1603.240810] dummy0: entered allmulticast mode
[ 1603.240860] dummy0: entered promiscuous mode
[ 1603.243273] br0: port 1(dummy0) entered blocking state
[ 1603.243330] br0: port 1(dummy0) entered forwarding state
[ 1603.422063] dummy0: left allmulticast mode
[ 1603.422092] dummy0: left promiscuous mode
[ 1603.422119] br0: port 1(dummy0) entered disabled state