c2
--

+ ip tcp_metrics show
192.168.119.83 age 5.664sec cwnd 26 reordering 16 rtt 12313us rttvar 10326us source 192.168.115.51
10.4.0.67 age 70.843sec cwnd 18 rtt 1972us rttvar 3515us source 10.4.0.51
10.4.0.68 age 70.844sec cwnd 16 rtt 4488us rttvar 6536us source 10.4.0.51
10.4.0.51 age 70.987sec cwnd 10 rtt 3599us rttvar 5557us source 10.4.0.51
10.4.0.83 age 70.889sec cwnd 16 rtt 4669us rttvar 8247us source 10.4.0.51


s2
--

+ ip tcp_metrics show
10.4.0.51 age 70.933sec cwnd 3 rtt 1617us rttvar 2888us source 10.4.0.83
192.168.115.51 age 5.706sec cwnd 10 rtt 11318us rttvar 9151us source 192.168.119.83


m2
--

+ iptables -t mangle -L POSTROUTING -n
Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination         
TOS        tcp  --  0.0.0.0/0            0.0.0.0/0            tcp flags:!0x17/0x02 TOS set 0x01/0xff


m3
--

+ tc -s -d qdisc show dev ens192
qdisc htb 1: root refcnt 2 r2q 10 default 0x1 direct_packets_stat 0 ver 3.17 direct_qlen 1000
 Sent 3818426 bytes 57443 pkt (dropped 0, overlimits 0 requeues 0) 
 backlog 0b 0p requeues 0
qdisc dualpi2 80ed: parent 1:1 limit 10000p target 15.0ms tupdate 16.0ms alpha 0.156250 beta 3.195312 l4s_ect coupling_factor 2 drop_on_overload step_thresh 1.0ms drop_dequeue classic_protection 10% 
 Sent 3818426 bytes 57443 pkt (dropped 0, overlimits 0 requeues 0) 
 backlog 0b 0p requeues 0
prob 0.000000 delay_c 1us delay_l 0us
pkts_in_c 57443 pkts_in_l 0 maxq 0
ecn_mark 0 step_marks 0
credit -121120 (L)

qdisc ingress ffff: parent ffff:fff1 ---------------- 
 Sent 349664388 bytes 240064 pkt (dropped 0, overlimits 0 requeues 0) 
 backlog 0b 0p requeues 0

+ tc -s -d class show dev ens192
class htb 1:1 root leaf 80ed: prio 0 quantum 200000 rate 50Mbit ceil 50Mbit linklayer ethernet burst 1600b/1 mpu 0b cburst 1600b/1 mpu 0b level 0 
 Sent 3818426 bytes 57443 pkt (dropped 0, overlimits 0 requeues 0) 
 backlog 0b 0p requeues 0
 lended: 57443 borrowed: 0 giants: 0
 tokens: 3755 ctokens: 3755


+ tc -s -d qdisc show dev ens224
qdisc htb 1: root refcnt 2 r2q 10 default 0x1 direct_packets_stat 0 ver 3.17 direct_qlen 1000
 Sent 362446084 bytes 240066 pkt (dropped 0, overlimits 58353 requeues 0) 
 backlog 0b 0p requeues 0
qdisc dualpi2 80ee: parent 1:1 limit 10000p target 15.0ms tupdate 16.0ms alpha 0.156250 beta 3.195312 l4s_ect coupling_factor 2 drop_on_overload step_thresh 1.0ms drop_dequeue classic_protection 10% 
 Sent 362446084 bytes 240066 pkt (dropped 0, overlimits 0 requeues 0) 
 backlog 0b 0p requeues 0
prob 0.000000 delay_c 1us delay_l 0us
pkts_in_c 707 pkts_in_l 58190 maxq 7
ecn_mark 11838 step_marks 11773
credit 8680 (C)

qdisc ingress ffff: parent ffff:fff1 ---------------- 
 Sent 3014388 bytes 57445 pkt (dropped 0, overlimits 0 requeues 0) 
 backlog 0b 0p requeues 0

+ tc -s -d class show dev ens224
class htb 1:1 root leaf 80ee: prio 0 quantum 200000 rate 50Mbit ceil 50Mbit linklayer ethernet burst 1600b/1 mpu 0b cburst 1600b/1 mpu 0b level 0 
 Sent 362446084 bytes 240066 pkt (dropped 0, overlimits 58353 requeues 0) 
 backlog 0b 0p requeues 0
 lended: 58897 borrowed: 0 giants: 0
 tokens: 3755 ctokens: 3755


+ tc -s -d qdisc show dev ifb4ens192
qdisc netem 1: root refcnt 2 limit 1000000 delay 5.0ms
 Sent 362446422 bytes 240069 pkt (dropped 0, overlimits 0 requeues 0) 
 backlog 0b 0p requeues 0

+ tc -s -d qdisc show dev ifb4ens224
qdisc netem 1: root refcnt 2 limit 1000000 delay 5.0ms
 Sent 3818968 bytes 57450 pkt (dropped 0, overlimits 0 requeues 0) 
 backlog 0b 0p requeues 0