[ 2049.306502][T17003] br0: port 1(dummy0) entered blocking state
[ 2049.306749][T17003] br0: port 1(dummy0) entered disabled state
[ 2049.306963][T17003] dummy0: entered allmulticast mode
[ 2049.307904][T17003] dummy0: entered promiscuous mode
[ 2049.341576][T17004] br0: port 1(dummy0) entered blocking state
[ 2049.341757][T17004] br0: port 1(dummy0) entered forwarding state
[ 2051.328770][   T12] dummy0: left allmulticast mode
[ 2051.329784][   T12] dummy0: left promiscuous mode
[ 2051.330009][   T12] br0: port 1(dummy0) entered disabled state