[ 2312.412988][ T3989] br0: port 1(dummy0) entered blocking state
[ 2312.413180][ T3989] br0: port 1(dummy0) entered disabled state
[ 2312.413882][ T3989] dummy0: entered allmulticast mode
[ 2312.414885][ T3989] dummy0: entered promiscuous mode
[ 2312.440849][ T3990] br0: port 1(dummy0) entered blocking state
[ 2312.441122][ T3990] br0: port 1(dummy0) entered forwarding state
[ 2314.816474][   T12] dummy0: left allmulticast mode
[ 2314.817755][   T12] dummy0: left promiscuous mode
[ 2314.817994][   T12] br0: port 1(dummy0) entered disabled state