[ 1931.177629][ T4712] br0: port 1(dummy0) entered blocking state
[ 1931.178112][ T4712] br0: port 1(dummy0) entered disabled state
[ 1931.178339][ T4712] dummy0: entered allmulticast mode
[ 1931.179320][ T4712] dummy0: entered promiscuous mode
[ 1931.202687][ T4713] br0: port 1(dummy0) entered blocking state
[ 1931.203054][ T4713] br0: port 1(dummy0) entered forwarding state
[ 1933.227457][   T71] dummy0: left allmulticast mode
[ 1933.227628][   T71] dummy0: left promiscuous mode
[ 1933.227854][   T71] br0: port 1(dummy0) entered disabled state