[-- MARK -- Wed Dec 28 12:35:00 2022] 
[ 4761.130381] Running test [R:13156962 T:25 - Networking TCP: keepalive test - Kernel: 6.0.15] 
[ 4834.632519] device lo entered promiscuous mode 
[ 4870.789489] device lo left promiscuous mode 
[ 4876.532975] device lo entered promiscuous mode 
[ 4912.688692] device lo left promiscuous mode