[ 1940.525928][T17756] br0: port 1(dummy0) entered blocking state
[ 1940.526157][T17756] br0: port 1(dummy0) entered disabled state
[ 1940.526367][T17756] dummy0: entered allmulticast mode
[ 1940.528640][T17756] dummy0: entered promiscuous mode
[ 1940.556140][T17757] br0: port 1(dummy0) entered blocking state
[ 1940.556371][T17757] br0: port 1(dummy0) entered forwarding state
[ 1942.546359][   T12] dummy0: left allmulticast mode
[ 1942.547121][   T12] dummy0: left promiscuous mode
[ 1942.547356][   T12] br0: port 1(dummy0) entered disabled state