Thanks Florin.

I've attached output from the console of the iperf3 server and client.

I don't know what I should be looking for.

Can you please provide some pointers?

Many thanks,

Kunal
root@ip-10-21-120-175:~# vppctl show session verbose 2
[0:0][CT:T] 0.0.0.0:5201->0.0.0.0:0                         LISTEN
[0:1][T] 0.0.0.0:5201->0.0.0.0:0                            LISTEN
Thread 0: active sessions 2
[1:0][T] 10.21.120.133:5201->10.21.120.187:8836             ESTABLISHED
 index: 0 cfg: TSO off flags: PSH pending timers:
 snd_una 5 snd_nxt 5 rcv_nxt 142 rcv_las 142
 snd_wnd 3999744 rcv_wnd 3999744 rcv_wscale 10 snd_wl1 142 snd_wl2 5
 flight size 0 out space 4348 rcv_wnd_av 3999744 tsval_recent 58931737
 tsecr 58931739 tsecr_last_ack 58931739 tsval_recent_age 3969 snd_mss 1448
 rto 200 rto_boff 0 srtt .3 us .237 rttvar .4 rtt_ts 0.0000 rtt_seq 4
 next_node 0 opaque 0x0 fib_index 0 sw_if_index 1
 cong:   none algo cubic cwnd 4348 ssthresh 2147483647 bytes_acked 1
         cc space 4348 prev_cwnd 0 prev_ssthresh 0
         snd_cong 0 dupack 0 limited_tx 4124685482
         rxt_bytes 0 rxt_delivered 0 rxt_head 4124685482 rxt_ts 58935708
         prr_start 4124685482 prr_delivered 0 prr space 0
 sboard: sacked 0 last_sacked 0 lost 0 last_lost 0 rxt_sacked 0
         last_delivered 0 high_sacked 4124685482 is_reneging 0 reorder 3
         cur_rxt_hole 4294967295 high_rxt 4124685482 rescue_rxt 4124685482
 stats: in segs 7 dsegs 2 bytes 141 dupacks 0
        out segs 7 dsegs 4 bytes 4 dupacks 0
        fr 0 tr 0 rxt segs 0 bytes 0 duration 3.972
        err wnd data below 0 above 0 ack below 0 above 0
 pacer: rate 18333978 bucket 0 t/p 18.334 last_update 3.969 s burst 1460
 transport: flags 0x5
 Rx fifo: cursize 0 nitems 4000000 has_event 0 min_alloc 65536
          head 141 tail 141 segment manager 3
          vpp session 0 thread 1 app session 1 thread 0
          ooo pool 0 active elts newest 4294967295
 Tx fifo: cursize 0 nitems 4000000 has_event 0 min_alloc 65536
          head 4 tail 4 segment manager 3
          vpp session 0 thread 1 app session 1 thread 0
          ooo pool 0 active elts newest 0
 session: state: ready opaque: 0x0 flags:
[1:1][T] 10.21.120.133:5201->10.21.120.187:19475            ESTABLISHED
 index: 1 cfg: TSO off flags:  timers:
 snd_una 1 snd_nxt 1 rcv_nxt 1894088294 rcv_las 1894088294
 snd_wnd 3999744 rcv_wnd 3999744 rcv_wscale 10 snd_wl1 1894086846 snd_wl2 1
 flight size 0 out space 4344 rcv_wnd_av 3999744 tsval_recent 58935706
 tsecr 58935708 tsecr_last_ack 58935708 tsval_recent_age 0 snd_mss 1448
 rto 200 rto_boff 0 srtt .1 us .100 rttvar 0.0 rtt_ts 0.0000 rtt_seq 2780822854
 next_node 0 opaque 0x0 fib_index 0 sw_if_index 1
 cong:   none algo cubic cwnd 4344 ssthresh 2147483647 bytes_acked 0
         cc space 4344 prev_cwnd 0 prev_ssthresh 0
         snd_cong 0 dupack 0 limited_tx 2780822854
         rxt_bytes 0 rxt_delivered 0 rxt_head 2780822854 rxt_ts 58935708
         prr_start 2780822854 prr_delivered 0 prr space 0
 sboard: sacked 0 last_sacked 0 lost 0 last_lost 0 rxt_sacked 0
         last_delivered 0 high_sacked 2780822854 is_reneging 0 reorder 3
         cur_rxt_hole 4294967295 high_rxt 2780822854 rescue_rxt 2780822854
 stats: in segs 1308074 dsegs 1308073 bytes 1894088293 dupacks 0
        out segs 306626 dsegs 0 bytes 0 dupacks 0
        fr 0 tr 0 rxt segs 0 bytes 0 duration 3.970
        err wnd data below 0 above 0 ack below 0 above 0
 pacer: rate 43440000 bucket 0 t/p 43.439 last_update 48 us burst 1460
 transport: flags 0x5
 Rx fifo: cursize 0 nitems 4000000 has_event 0 min_alloc 65536
          head 1894088293 tail 1894088293 segment manager 3
          vpp session 1 thread 1 app session 2 thread 0
          ooo pool 0 active elts newest 4294967295
 Tx fifo: cursize 0 nitems 4000000 has_event 0 min_alloc 65536
          head 0 tail 0 segment manager 3
          vpp session 1 thread 1 app session 2 thread 0
          ooo pool 0 active elts newest 0
 session: state: ready opaque: 0x0 flags:
Thread 1: active sessions 2
Thread 2: no sessions
Thread 3: no sessions
Thread 4: no sessions
Thread 5: no sessions
Thread 6: no sessions
Thread 7: no sessions
root@ip-10-21-120-175:~# vppctl show session verbose 2
[0:0][CT:T] 0.0.0.0:5201->0.0.0.0:0                         LISTEN
[0:1][T] 0.0.0.0:5201->0.0.0.0:0                            LISTEN
Thread 0: active sessions 2
[1:0][T] 10.21.120.133:5201->10.21.120.187:8836             ESTABLISHED
 index: 0 cfg: TSO off flags: PSH pending timers:
 snd_una 5 snd_nxt 5 rcv_nxt 142 rcv_las 142
 snd_wnd 3999744 rcv_wnd 3999744 rcv_wscale 10 snd_wl1 142 snd_wl2 5
 flight size 0 out space 4348 rcv_wnd_av 3999744 tsval_recent 58931737
 tsecr 58931739 tsecr_last_ack 58931739 tsval_recent_age 15785 snd_mss 1448
 rto 200 rto_boff 0 srtt .3 us .237 rttvar .4 rtt_ts 0.0000 rtt_seq 4
 next_node 0 opaque 0x0 fib_index 0 sw_if_index 1
 cong:   none algo cubic cwnd 4348 ssthresh 2147483647 bytes_acked 1
         cc space 4348 prev_cwnd 0 prev_ssthresh 0
         snd_cong 0 dupack 0 limited_tx 4124685482
         rxt_bytes 0 rxt_delivered 0 rxt_head 4124685482 rxt_ts 58947524
         prr_start 4124685482 prr_delivered 0 prr space 0
 sboard: sacked 0 last_sacked 0 lost 0 last_lost 0 rxt_sacked 0
         last_delivered 0 high_sacked 4124685482 is_reneging 0 reorder 3
         cur_rxt_hole 4294967295 high_rxt 4124685482 rescue_rxt 4124685482
 stats: in segs 7 dsegs 2 bytes 141 dupacks 0
        out segs 7 dsegs 4 bytes 4 dupacks 0
        fr 0 tr 0 rxt segs 0 bytes 0 duration 15.788
        err wnd data below 0 above 0 ack below 0 above 0
 pacer: rate 18333978 bucket 0 t/p 18.334 last_update 15.785 s burst 1460
 transport: flags 0x5
 Rx fifo: cursize 0 nitems 4000000 has_event 0 min_alloc 65536
          head 141 tail 141 segment manager 3
          vpp session 0 thread 1 app session 1 thread 0
          ooo pool 0 active elts newest 4294967295
 Tx fifo: cursize 0 nitems 4000000 has_event 0 min_alloc 65536
          head 4 tail 4 segment manager 3
          vpp session 0 thread 1 app session 1 thread 0
          ooo pool 0 active elts newest 0
 session: state: ready opaque: 0x0 flags:
[1:1][T] 10.21.120.133:5201->10.21.120.187:19475            ESTABLISHED
 index: 1 cfg: TSO off flags:  timers:
 snd_una 1 snd_nxt 1 rcv_nxt 3251011070 rcv_las 3251011070
 snd_wnd 3999744 rcv_wnd 3999744 rcv_wscale 10 snd_wl1 3251009622 snd_wl2 1
 flight size 0 out space 4344 rcv_wnd_av 3999744 tsval_recent 58947522
 tsecr 58947524 tsecr_last_ack 58947524 tsval_recent_age 0 snd_mss 1448
 rto 200 rto_boff 0 srtt .1 us .100 rttvar 0.0 rtt_ts 0.0000 rtt_seq 2780822854
 next_node 0 opaque 0x0 fib_index 0 sw_if_index 1
 cong:   none algo cubic cwnd 4344 ssthresh 2147483647 bytes_acked 0
         cc space 4344 prev_cwnd 0 prev_ssthresh 0
         snd_cong 0 dupack 0 limited_tx 2780822854
         rxt_bytes 0 rxt_delivered 0 rxt_head 2780822854 rxt_ts 58947524
         prr_start 2780822854 prr_delivered 0 prr space 0
 sboard: sacked 0 last_sacked 0 lost 0 last_lost 0 rxt_sacked 0
         last_delivered 0 high_sacked 2780822854 is_reneging 0 reorder 3
         cur_rxt_hole 4294967295 high_rxt 2780822854 rescue_rxt 2780822854
 stats: in segs 5211313 dsegs 5211312 bytes 7545978365 dupacks 0
        out segs 1219811 dsegs 0 bytes 0 dupacks 0
        fr 0 tr 0 rxt segs 0 bytes 0 duration 15.786
        err wnd data below 0 above 0 ack below 0 above 0
 pacer: rate 43440000 bucket 0 t/p 43.439 last_update 67 us burst 1460
 transport: flags 0x5
 Rx fifo: cursize 0 nitems 4000000 has_event 0 min_alloc 65536
          head 3251011069 tail 3251011069 segment manager 3
          vpp session 1 thread 1 app session 2 thread 0
          ooo pool 0 active elts newest 4294967295
 Tx fifo: cursize 0 nitems 4000000 has_event 0 min_alloc 65536
          head 0 tail 0 segment manager 3
          vpp session 1 thread 1 app session 2 thread 0
          ooo pool 0 active elts newest 0
 session: state: ready opaque: 0x0 flags:
Thread 1: active sessions 2
Thread 2: no sessions
Thread 3: no sessions
Thread 4: no sessions
Thread 5: no sessions
Thread 6: no sessions
Thread 7: no sessions
root@ip-10-21-120-175:~# vppctl show session verbose 2
[0:0][CT:T] 0.0.0.0:5201->0.0.0.0:0                         LISTEN
[0:1][T] 0.0.0.0:5201->0.0.0.0:0                            LISTEN
Thread 0: active sessions 2
[1:0][T] 10.21.120.133:5201->10.21.120.187:8836             TIME_WAIT
 index: 0 cfg: TSO off flags: FIN sent, PSH pending timers: WAIT CLOSE
 snd_una 285 snd_nxt 285 rcv_nxt 435 rcv_las 435
 snd_wnd 3999744 rcv_wnd 3999744 rcv_wscale 10 snd_wl1 434 snd_wl2 284
 flight size 0 out space 4627 rcv_wnd_av 3999744 tsval_recent 58951738
 tsecr 58951739 tsecr_last_ack 58951739 tsval_recent_age 1667 snd_mss 1448
 rto 200 rto_boff 0 srtt .3 us .219 rttvar .3 rtt_ts 0.0000 rtt_seq 283
 next_node 0 opaque 0x0 fib_index 0 sw_if_index 1
 cong:   none algo cubic cwnd 4627 ssthresh 2147483647 bytes_acked 1
         cc space 4627 prev_cwnd 0 prev_ssthresh 0
         snd_cong 0 dupack 0 limited_tx 4124685482
         rxt_bytes 0 rxt_delivered 0 rxt_head 4124685482 rxt_ts 58953406
         prr_start 4124685482 prr_delivered 0 prr space 0
 sboard: sacked 0 last_sacked 0 lost 0 last_lost 0 rxt_sacked 0
         last_delivered 0 high_sacked 4124685482 is_reneging 0 reorder 3
         cur_rxt_hole 4294967295 high_rxt 4124685482 rescue_rxt 4124685482
 stats: in segs 14 dsegs 5 bytes 433 dupacks 1
        out segs 15 dsegs 7 bytes 283 dupacks 0
        fr 0 tr 0 rxt segs 0 bytes 0 duration 21.669
        err wnd data below 0 above 0 ack below 0 above 0
 pacer: rate 21163904 bucket 0 t/p 21.164 last_update 1.666 s burst 1460
 transport: flags 0x5
 Rx fifo: cursize 0 nitems 4000000 has_event 0 min_alloc 65536
          head 433 tail 433 segment manager 3
          vpp session 0 thread 1 app session 1 thread 0
          ooo pool 0 active elts newest 4294967295
 Tx fifo: cursize 0 nitems 4000000 has_event 0 min_alloc 65536
          head 283 tail 283 segment manager 3
          vpp session 0 thread 1 app session 1 thread 0
          ooo pool 0 active elts newest 0
 session: state: closed opaque: 0x0 flags:
Thread 1: active sessions 1
Thread 2: no sessions
Thread 3: no sessions
Thread 4: no sessions
Thread 5: no sessions
Thread 6: no sessions
Thread 7: no sessions
root@ip-10-21-120-175:~# vppctl show run
Thread 0 vpp_main (lcore 1)
Time 42.3, 10 sec internal node vector rate 0.00 loops/sec 12633.36
  vector rates in 0.0000e0, out 0.0000e0, drop 0.0000e0, punt 0.0000e0
             Name                 State         Calls          Vectors        
Suspends         Clocks       Vectors/Call
api-rx-from-ring                any wait                 0               0      
         4          3.44e4            0.00
dpdk-process                    any wait                 0               0      
        14          1.03e5            0.00
fib-walk                        any wait                 0               0      
        21          4.98e3            0.00
ip4-full-reassembly-expire-wal  any wait                 0               0      
         4          4.05e3            0.00
ip4-sv-reassembly-expire-walk   any wait                 0               0      
         4          3.64e3            0.00
ip6-full-reassembly-expire-wal  any wait                 0               0      
         4          3.75e3            0.00
ip6-mld-process                 any wait                 0               0      
        42          2.37e3            0.00
ip6-ra-process                  any wait                 0               0      
        42          1.58e3            0.00
ip6-sv-reassembly-expire-walk   any wait                 0               0      
         4          3.79e3            0.00
session-queue                 interrupt wa               1               0      
         0          1.61e5            0.00
session-queue-process           any wait                 0               0      
        42          1.29e5            0.00
statseg-collector-process       time wait                0               0      
         4          1.97e6            0.00
unix-cli-local:38                active                  7               0      
        14         8.78e13            0.00
unix-cli-new-session            any wait                 0               0      
        14          2.81e3            0.00
unix-epoll-input                 polling            558609               0      
         0          2.26e5            0.00
---------------
Thread 1 vpp_wk_0 (lcore 2)
Time 42.3, 10 sec internal node vector rate 3.01 loops/sec 5850698.93
  vector rates in 1.9287e5, out 3.6584e4, drop 1.8930e-1, punt 0.0000e0
             Name                 State         Calls          Vectors        
Suspends         Clocks       Vectors/Call
arp-input                        active                  1               1      
         0          2.08e3            1.00
arp-reply                        active                  1               1      
         0          1.33e4            1.00
dpdk-input                       polling         205165165         6604753      
         0          5.82e3             .03
drop                             active                  1               8      
         0          4.01e2            8.00
error-drop                       active                  1               8      
         0          1.88e2            8.00
ethernet-input                   active            1545949         6604753      
         0          1.18e2            4.27
interface-output                 active                  1               1      
         0          1.10e3            1.00
ip4-drop                         active                  1               8      
         0          3.11e2            8.00
ip4-input-no-checksum            active            1545948         6604752      
         0          9.84e1            4.27
ip4-lookup                       active            1914915         8150809      
         0          1.05e2            4.26
ip4-receive                      active            1545948         6604752      
         0          3.77e2            4.27
ip4-rewrite                      active            1545950         1546057      
         0          2.53e2            1.00
session-queue                    polling         205165165         1545934      
         0          2.99e4            0.00
tcp4-established                 active            1545928         6604617      
         0          9.66e2            4.27
tcp4-input                       active            1545948         6604752      
         0          1.52e2            4.27
tcp4-listen                      active                  2               2      
         0          2.72e5            1.00
tcp4-output                      active            1545935         1545936      
         0          4.65e2            1.00
tcp4-rcv-process                 active                  4               4      
         0          5.05e3            1.00
tcp4-reset                       active                 15             121      
         0          1.88e2            8.07
unix-epoll-input                 polling            200161               0      
         0          1.56e3            0.00
vpp0-output                      active            1545951         1546058      
         0          2.92e2            1.00
vpp0-tx                          active            1545951         1546058      
         0          4.29e3            1.00
---------------
Thread 2 vpp_wk_1 (lcore 3)
Time 42.3, 10 sec internal node vector rate 0.00 loops/sec 9238049.13
  vector rates in 0.0000e0, out 0.0000e0, drop 0.0000e0, punt 0.0000e0
             Name                 State         Calls          Vectors        
Suspends         Clocks       Vectors/Call
session-queue                    polling         407564412               0      
         0          2.08e2            0.00
unix-epoll-input                 polling            397623               0      
         0          1.52e3            0.00
---------------
Thread 3 vpp_wk_2 (lcore 4)
Time 42.3, 10 sec internal node vector rate 0.00 loops/sec 9346685.86
  vector rates in 0.0000e0, out 0.0000e0, drop 0.0000e0, punt 0.0000e0
             Name                 State         Calls          Vectors        
Suspends         Clocks       Vectors/Call
session-queue                    polling         407313973               0      
         0          2.08e2            0.00
unix-epoll-input                 polling            397380               0      
         0          1.53e3            0.00
---------------
Thread 4 vpp_wk_3 (lcore 5)
Time 42.3, 10 sec internal node vector rate 0.00 loops/sec 9234939.81
  vector rates in 0.0000e0, out 0.0000e0, drop 0.0000e0, punt 0.0000e0
             Name                 State         Calls          Vectors        
Suspends         Clocks       Vectors/Call
session-queue                    polling         407104085               0      
         0          2.08e2            0.00
unix-epoll-input                 polling            397175               0      
         0          1.53e3            0.00
---------------
Thread 5 vpp_wk_4 (lcore 6)
Time 42.3, 10 sec internal node vector rate 0.00 loops/sec 9365827.19
  vector rates in 0.0000e0, out 0.0000e0, drop 0.0000e0, punt 0.0000e0
             Name                 State         Calls          Vectors        
Suspends         Clocks       Vectors/Call
session-queue                    polling         407417280               0      
         0          2.08e2            0.00
unix-epoll-input                 polling            397481               0      
         0          1.52e3            0.00
---------------
Thread 6 vpp_wk_5 (lcore 7)
Time 42.3, 10 sec internal node vector rate 0.00 loops/sec 9318986.78
  vector rates in 0.0000e0, out 0.0000e0, drop 0.0000e0, punt 0.0000e0
             Name                 State         Calls          Vectors        
Suspends         Clocks       Vectors/Call
session-queue                    polling         407414888               0      
         0          2.08e2            0.00
unix-epoll-input                 polling            397478               0      
         0          1.51e3            0.00
---------------
Thread 7 vpp_wk_6 (lcore 8)
Time 42.3, 10 sec internal node vector rate 0.00 loops/sec 9325118.69
  vector rates in 0.0000e0, out 0.0000e0, drop 0.0000e0, punt 0.0000e0
             Name                 State         Calls          Vectors        
Suspends         Clocks       Vectors/Call
session-queue                    polling         407392352               0      
         0          2.08e2            0.00
unix-epoll-input                 polling            397456               0      
         0          1.52e3            0.00
root@ip-10-21-120-175:~# vppctl show errors
   Count                  Node                              Reason              
 Severity
         1             arp-reply                       ARP replies sent         
   error
   1545934           session-queue                   Packets transmitted        
   info
         8             tcp4-input                     Connection closed         
   warn
         2            tcp4-listen                       SYNs received           
   info
         3          tcp4-rcv-process                  Pure ACKs received        
   info
         1          tcp4-rcv-process                    FINs received           
   info
   6604611          tcp4-established             Packets pushed into rx fifo    
   info
         6          tcp4-established                  Pure ACKs received        
   info
       121             tcp4-reset                        Resets sent            
   info
   1545936            tcp4-output                        Packets sent           
   info
         1            tcp4-output                        Resets sent            
   info
root@ip-10-21-120-175:~#
root@ip-10-21-120-238:~# vppctl show session verbose 2
Thread 0: no sessions
[1:0][T] 10.21.120.187:8836->10.21.120.133:5201             ESTABLISHED
 index: 0 cfg: TSO off flags: PSH pending timers:
 snd_una 142 snd_nxt 142 rcv_nxt 5 rcv_las 5
 snd_wnd 3999744 rcv_wnd 3999744 rcv_wscale 10 snd_wl1 4 snd_wl2 142
 flight size 0 out space 4485 rcv_wnd_av 3999744 tsval_recent 58931739
 tsecr 58931736 tsecr_last_ack 58931736 tsval_recent_age 3970 snd_mss 1448
 rto 200 rto_boff 0 srtt .2 us .228 rttvar .2 rtt_ts 0.0000 rtt_seq 142
 next_node 0 opaque 0x0 fib_index 0 sw_if_index 1
 cong:   none algo cubic cwnd 4485 ssthresh 2147483647 bytes_acked 0
         cc space 4485 prev_cwnd 0 prev_ssthresh 0
         snd_cong 0 dupack 0 limited_tx 1554027199
         rxt_bytes 0 rxt_delivered 0 rxt_head 1554027199 rxt_ts 58935707
         prr_start 1554027199 prr_delivered 0 prr space 0
 sboard: sacked 0 last_sacked 0 lost 0 last_lost 0 rxt_sacked 0
         last_delivered 0 high_sacked 1554027199 is_reneging 0 reorder 3
         cur_rxt_hole 4294967295 high_rxt 1554027199 rescue_rxt 1554027199
 stats: in segs 7 dsegs 4 bytes 4 dupacks 0
        out segs 8 dsegs 2 bytes 141 dupacks 0
        fr 0 tr 0 rxt segs 0 bytes 0 duration 3.972
        err wnd data below 0 above 0 ack below 0 above 0
 pacer: rate 19757709 bucket 0 t/p 19.758 last_update 3.969 s burst 1460
 transport: flags 0x5
 Rx fifo: cursize 0 nitems 4000000 has_event 0 min_alloc 65536
          head 4 tail 4 segment manager 1
          vpp session 0 thread 1 app session 0 thread 0
          ooo pool 0 active elts newest 4294967295
 Tx fifo: cursize 0 nitems 4000000 has_event 0 min_alloc 65536
          head 141 tail 141 segment manager 1
          vpp session 0 thread 1 app session 0 thread 0
          ooo pool 0 active elts newest 0
 session: state: ready opaque: 0x0 flags:
[1:1][T] 10.21.120.187:19475->10.21.120.133:5201            ESTABLISHED
 index: 1 cfg: TSO off flags: PSH pending timers: RETRANSMIT
 snd_una 1894088294 snd_nxt 1894337350 rcv_nxt 1 rcv_las 1
 snd_wnd 3999744 rcv_wnd 3999744 rcv_wscale 10 snd_wl1 1 snd_wl2 1894088294
 flight size 249056 out space 3750688 rcv_wnd_av 3999744 tsval_recent 58935708
 tsecr 58935706 tsecr_last_ack 58935706 tsval_recent_age 0 snd_mss 1448
 rto 200 rto_boff 0 srtt .9 us .271 rttvar 0.0 rtt_ts 58935.7070 rtt_seq 
1894212822
 next_node 0 opaque 0x0 fib_index 0 sw_if_index 1
 cong:   none algo cubic cwnd 4006653 ssthresh 2147483647 bytes_acked 1448
         cc space 3750688 prev_cwnd 0 prev_ssthresh 0
         snd_cong 0 dupack 0 limited_tx 2694475276
         rxt_bytes 0 rxt_delivered 0 rxt_head 2694475276 rxt_ts 58935707
         prr_start 2694475276 prr_delivered 0 prr space 0
 sboard: sacked 0 last_sacked 0 lost 0 last_lost 0 rxt_sacked 0
         last_delivered 0 high_sacked 2694475276 is_reneging 0 reorder 3
         cur_rxt_hole 4294967295 high_rxt 2694475276 rescue_rxt 2694475276
 stats: in segs 306626 dsegs 0 bytes 0 dupacks 0
        out segs 1308247 dsegs 1308245 bytes 1894337349 dupacks 0
        fr 0 tr 0 rxt segs 0 bytes 0 duration 3.971
        err wnd data below 0 above 0 ack below 0 above 0
 pacer: rate 14782684686 bucket 516 t/p 14782.685 last_update 7 us burst 62780
 transport: flags 0x1
 Rx fifo: cursize 0 nitems 4000000 has_event 0 min_alloc 65536
          head 0 tail 0 segment manager 1
          vpp session 1 thread 1 app session 1 thread 0
          ooo pool 0 active elts newest 0
 Tx fifo: cursize 4000000 nitems 4000000 has_event 1 min_alloc 65536
          head 1894088293 tail 1898088293 segment manager 1
          vpp session 1 thread 1 app session 1 thread 0
          ooo pool 0 active elts newest 0
 session: state: ready opaque: 0x0 flags:
Thread 1: active sessions 2
Thread 2: no sessions
Thread 3: no sessions
Thread 4: no sessions
Thread 5: no sessions
Thread 6: no sessions
Thread 7: no sessions
root@ip-10-21-120-238:~# vppctl show session verbose 2
Thread 0: no sessions
[1:0][T] 10.21.120.187:8836->10.21.120.133:5201             ESTABLISHED
 index: 0 cfg: TSO off flags: PSH pending timers:
 snd_una 142 snd_nxt 142 rcv_nxt 5 rcv_las 5
 snd_wnd 3999744 rcv_wnd 3999744 rcv_wscale 10 snd_wl1 4 snd_wl2 142
 flight size 0 out space 4485 rcv_wnd_av 3999744 tsval_recent 58931739
 tsecr 58931736 tsecr_last_ack 58931736 tsval_recent_age 15786 snd_mss 1448
 rto 200 rto_boff 0 srtt .2 us .228 rttvar .2 rtt_ts 0.0000 rtt_seq 142
 next_node 0 opaque 0x0 fib_index 0 sw_if_index 1
 cong:   none algo cubic cwnd 4485 ssthresh 2147483647 bytes_acked 0
         cc space 4485 prev_cwnd 0 prev_ssthresh 0
         snd_cong 0 dupack 0 limited_tx 1554027199
         rxt_bytes 0 rxt_delivered 0 rxt_head 1554027199 rxt_ts 58947523
         prr_start 1554027199 prr_delivered 0 prr space 0
 sboard: sacked 0 last_sacked 0 lost 0 last_lost 0 rxt_sacked 0
         last_delivered 0 high_sacked 1554027199 is_reneging 0 reorder 3
         cur_rxt_hole 4294967295 high_rxt 1554027199 rescue_rxt 1554027199
 stats: in segs 7 dsegs 4 bytes 4 dupacks 0
        out segs 8 dsegs 2 bytes 141 dupacks 0
        fr 0 tr 0 rxt segs 0 bytes 0 duration 15.788
        err wnd data below 0 above 0 ack below 0 above 0
 pacer: rate 19757709 bucket 0 t/p 19.758 last_update 15.786 s burst 1460
 transport: flags 0x5
 Rx fifo: cursize 0 nitems 4000000 has_event 0 min_alloc 65536
          head 4 tail 4 segment manager 1
          vpp session 0 thread 1 app session 0 thread 0
          ooo pool 0 active elts newest 4294967295
 Tx fifo: cursize 0 nitems 4000000 has_event 0 min_alloc 65536
          head 141 tail 141 segment manager 1
          vpp session 0 thread 1 app session 0 thread 0
          ooo pool 0 active elts newest 0
 session: state: ready opaque: 0x0 flags:
[1:1][T] 10.21.120.187:19475->10.21.120.133:5201            ESTABLISHED
 index: 1 cfg: TSO off flags: PSH pending timers: RETRANSMIT
 snd_una 3251197862 snd_nxt 3251322390 rcv_nxt 1 rcv_las 1
 snd_wnd 3996672 rcv_wnd 3999744 rcv_wscale 10 snd_wl1 1 snd_wl2 3251197862
 flight size 124528 out space 3872144 rcv_wnd_av 3999744 tsval_recent 58947524
 tsecr 58947523 tsecr_last_ack 58947523 tsval_recent_age 0 snd_mss 1448
 rto 200 rto_boff 0 srtt .9 us .272 rttvar .2 rtt_ts 0.0000 rtt_seq 3251197862
 next_node 0 opaque 0x0 fib_index 0 sw_if_index 1
 cong:   none algo cubic cwnd 4006653 ssthresh 2147483647 bytes_acked 7240
         cc space 3872144 prev_cwnd 0 prev_ssthresh 0
         snd_cong 0 dupack 0 limited_tx 2694475276
         rxt_bytes 0 rxt_delivered 0 rxt_head 2694475276 rxt_ts 58947523
         prr_start 2694475276 prr_delivered 0 prr space 0
 sboard: sacked 0 last_sacked 0 lost 0 last_lost 0 rxt_sacked 0
         last_delivered 0 high_sacked 2694475276 is_reneging 0 reorder 3
         cur_rxt_hole 4294967295 high_rxt 2694475276 rescue_rxt 2694475276
 stats: in segs 1219820 dsegs 0 bytes 0 dupacks 0
        out segs 5211529 dsegs 5211527 bytes 7546289685 dupacks 0
        fr 0 tr 0 rxt segs 0 bytes 0 duration 15.787
        err wnd data below 0 above 0 ack below 0 above 0
 pacer: rate 14744321380 bucket 516 t/p 14744.321 last_update 14 us burst 62780
 transport: flags 0x1
 Rx fifo: cursize 0 nitems 4000000 has_event 0 min_alloc 65536
          head 0 tail 0 segment manager 1
          vpp session 1 thread 1 app session 1 thread 0
          ooo pool 0 active elts newest 0
 Tx fifo: cursize 4000000 nitems 4000000 has_event 1 min_alloc 65536
          head 3251197861 tail 3255197861 segment manager 1
          vpp session 1 thread 1 app session 1 thread 0
          ooo pool 0 active elts newest 0
 session: state: ready opaque: 0x0 flags:
Thread 1: active sessions 2
Thread 2: no sessions
Thread 3: no sessions
Thread 4: no sessions
Thread 5: no sessions
Thread 6: no sessions
Thread 7: no sessions
root@ip-10-21-120-238:~# vppctl show session verbose 2
Thread 0: no sessions
[1:0][T] 10.21.120.187:8836->10.21.120.133:5201             TIME_WAIT
 index: 0 cfg: TSO off flags: FIN sent, PSH pending timers: WAIT CLOSE
 snd_una 435 snd_nxt 435 rcv_nxt 285 rcv_las 285
 snd_wnd 3999744 rcv_wnd 3999744 rcv_wscale 10 snd_wl1 284 snd_wl2 434
 flight size 0 out space 4777 rcv_wnd_av 3999744 tsval_recent 58951739
 tsecr 58951738 tsecr_last_ack 58951738 tsval_recent_age 1666 snd_mss 1448
 rto 200 rto_boff 0 srtt .2 us .197 rttvar .1 rtt_ts 0.0000 rtt_seq 434
 next_node 0 opaque 0x0 fib_index 0 sw_if_index 1
 cong:   none algo cubic cwnd 4777 ssthresh 2147483647 bytes_acked 1
         cc space 4777 prev_cwnd 0 prev_ssthresh 0
         snd_cong 0 dupack 0 limited_tx 1554027199
         rxt_bytes 0 rxt_delivered 0 rxt_head 1554027199 rxt_ts 58953404
         prr_start 1554027199 prr_delivered 0 prr space 0
 sboard: sacked 0 last_sacked 0 lost 0 last_lost 0 rxt_sacked 0
         last_delivered 0 high_sacked 1554027199 is_reneging 0 reorder 3
         cur_rxt_hole 4294967295 high_rxt 1554027199 rescue_rxt 1554027199
 stats: in segs 15 dsegs 7 bytes 283 dupacks 1
        out segs 15 dsegs 5 bytes 433 dupacks 0
        fr 0 tr 0 rxt segs 0 bytes 0 duration 21.669
        err wnd data below 0 above 0 ack below 0 above 0
 pacer: rate 24497435 bucket 0 t/p 24.497 last_update 1.667 s burst 1460
 transport: flags 0x5
 Rx fifo: cursize 0 nitems 4000000 has_event 0 min_alloc 65536
          head 283 tail 283 segment manager 1
          vpp session 0 thread 1 app session 0 thread 0
          ooo pool 0 active elts newest 4294967295
 Tx fifo: cursize 0 nitems 4000000 has_event 0 min_alloc 65536
          head 433 tail 433 segment manager 1
          vpp session 0 thread 1 app session 0 thread 0
          ooo pool 0 active elts newest 0
 session: state: closed opaque: 0x0 flags:
Thread 1: active sessions 1
Thread 2: no sessions
Thread 3: no sessions
Thread 4: no sessions
Thread 5: no sessions
Thread 6: no sessions
Thread 7: no sessions
root@ip-10-21-120-238:~# vppctl show run
Thread 0 vpp_main (lcore 1)
Time 42.3, 10 sec internal node vector rate 0.00 loops/sec 19167.29
  vector rates in 0.0000e0, out 4.7325e-2, drop 0.0000e0, punt 0.0000e0
             Name                 State         Calls          Vectors        
Suspends         Clocks       Vectors/Call
api-rx-from-ring                any wait                 0               0      
         2          2.33e4            0.00
dpdk-process                    any wait                 0               0      
        14          9.48e4            0.00
fib-walk                        any wait                 0               0      
        21          5.38e3            0.00
ip4-full-reassembly-expire-wal  any wait                 0               0      
         4          3.77e3            0.00
ip4-lookup                       active                  2               2      
         0          1.88e3            1.00
ip4-rewrite                      active                  2               2      
         0          1.46e3            1.00
ip4-sv-reassembly-expire-walk   any wait                 0               0      
         4          3.12e3            0.00
ip6-full-reassembly-expire-wal  any wait                 0               0      
         4          3.27e3            0.00
ip6-mld-process                 any wait                 0               0      
        42          2.65e3            0.00
ip6-ra-process                  any wait                 0               0      
        42          1.25e3            0.00
ip6-sv-reassembly-expire-walk   any wait                 0               0      
         4          3.78e3            0.00
session-queue                 interrupt wa           58563               0      
         0          3.40e2            0.00
session-queue-process           any wait                 0               0      
        42          1.29e5            0.00
statseg-collector-process       time wait                0               0      
         4          1.94e6            0.00
tcp4-output                      active                  2               2      
         0          1.60e3            1.00
unix-cli-local:38                active                  7               0      
        14         5.85e13            0.00
unix-cli-new-session            any wait                 0               0      
        14          2.48e3            0.00
unix-epoll-input                 polling            549375               0      
         0          2.30e5            0.00
vpp0-output                      active                  2               2      
         0          2.31e3            1.00
vpp0-tx                          active                  2               2      
         0          1.04e4            1.00
---------------
Thread 1 vpp_wk_0 (lcore 2)
Time 42.3, 10 sec internal node vector rate 27.44 loops/sec 6602563.24
  vector rates in 1.9287e5, out 1.5629e5, drop 2.6739e0, punt 0.0000e0
             Name                 State         Calls          Vectors        
Suspends         Clocks       Vectors/Call
arp-input                        active                  1               1      
         0          1.79e3            1.00
arp-reply                        active                  1               1      
         0          1.76e4            1.00
dpdk-input                       polling         152305626         1546058      
         0          1.49e4             .01
drop                             active                 20             113      
         0          8.55e1            5.65
error-drop                       active                 20             113      
         0          7.30e1            5.65
ethernet-input                   active             153689         1546058      
         0          1.05e2           10.06
interface-output                 active                  1               1      
         0          1.39e3            1.00
ip4-drop                         active                 20             113      
         0          7.25e1            5.65
ip4-input-no-checksum            active             153688         1546057      
         0          5.38e1           10.06
ip4-lookup                       active             153762         8150807      
         0          2.91e1           53.01
ip4-receive                      active             153688         1546057      
         0          3.22e2           10.06
ip4-rewrite                      active             153725         6604750      
         0          2.15e1           42.96
session-queue                    polling         152305626         6604750      
         0          4.79e3             .04
tcp4-established                 active             153665         1545939      
         0          4.39e2           10.06
tcp4-input                       active             153688         1546057      
         0          1.09e2           10.06
tcp4-output                      active             153725         6604750      
         0          4.01e1           42.96
tcp4-rcv-process                 active                  3               3      
         0          3.76e3            1.00
tcp4-syn-sent                    active                  2               2      
         0          1.57e5            1.00
unix-epoll-input                 polling            148591               0      
         0          1.51e3            0.00
vpp0-output                      active             153726         6604751      
         0          2.35e2           42.96
vpp0-tx                          active             153726         6604751      
         0          7.91e3           42.96
---------------
Thread 2 vpp_wk_1 (lcore 3)
Time 42.3, 10 sec internal node vector rate 0.00 loops/sec 9262560.29
  vector rates in 0.0000e0, out 0.0000e0, drop 0.0000e0, punt 0.0000e0
             Name                 State         Calls          Vectors        
Suspends         Clocks       Vectors/Call
session-queue                    polling         407198715               0      
         0          2.08e2            0.00
unix-epoll-input                 polling            397267               0      
         0          1.52e3            0.00
---------------
Thread 3 vpp_wk_2 (lcore 4)
Time 42.3, 10 sec internal node vector rate 0.00 loops/sec 9290500.08
  vector rates in 0.0000e0, out 0.0000e0, drop 0.0000e0, punt 0.0000e0
             Name                 State         Calls          Vectors        
Suspends         Clocks       Vectors/Call
session-queue                    polling         406741069               0      
         0          2.08e2            0.00
unix-epoll-input                 polling            396821               0      
         0          1.53e3            0.00
---------------
Thread 4 vpp_wk_3 (lcore 5)
Time 42.3, 10 sec internal node vector rate 0.00 loops/sec 9281729.70
  vector rates in 0.0000e0, out 0.0000e0, drop 0.0000e0, punt 0.0000e0
             Name                 State         Calls          Vectors        
Suspends         Clocks       Vectors/Call
session-queue                    polling         407053102               0      
         0          2.08e2            0.00
unix-epoll-input                 polling            397125               0      
         0          1.55e3            0.00
---------------
Thread 5 vpp_wk_4 (lcore 6)
Time 42.3, 10 sec internal node vector rate 0.00 loops/sec 9322324.59
  vector rates in 0.0000e0, out 0.0000e0, drop 0.0000e0, punt 0.0000e0
             Name                 State         Calls          Vectors        
Suspends         Clocks       Vectors/Call
session-queue                    polling         407143324               0      
         0          2.08e2            0.00
unix-epoll-input                 polling            397213               0      
         0          1.53e3            0.00
---------------
Thread 6 vpp_wk_5 (lcore 7)
Time 42.3, 10 sec internal node vector rate 0.00 loops/sec 9199319.70
  vector rates in 0.0000e0, out 0.0000e0, drop 0.0000e0, punt 0.0000e0
             Name                 State         Calls          Vectors        
Suspends         Clocks       Vectors/Call
session-queue                    polling         406401758               0      
         0          2.09e2            0.00
unix-epoll-input                 polling            396489               0      
         0          1.51e3            0.00
---------------
Thread 7 vpp_wk_6 (lcore 8)
Time 42.3, 10 sec internal node vector rate 0.00 loops/sec 9381537.16
  vector rates in 0.0000e0, out 0.0000e0, drop 0.0000e0, punt 0.0000e0
             Name                 State         Calls          Vectors        
Suspends         Clocks       Vectors/Call
session-queue                    polling         406591575               0      
         0          2.09e2            0.00
unix-epoll-input                 polling            396675               0      
         0          1.51e3            0.00
root@ip-10-21-120-238:~# vppctl show errors
   Count                  Node                              Reason              
 Severity
         2            tcp4-output                        Packets sent           
   info
         1             arp-reply                       ARP replies sent         
   error
   6604750           session-queue                   Packets transmitted        
   info
       113             tcp4-input                     Connection closed         
   warn
         2          tcp4-rcv-process                  Pure ACKs received        
   info
         1          tcp4-rcv-process                    FINs received           
   info
         2           tcp4-syn-sent                    SYN-ACKs received         
   info
         7          tcp4-established             Packets pushed into rx fifo    
   info
   1545923          tcp4-established                  Pure ACKs received        
   info
         1          tcp4-established                   Resets received          
   info
         8          tcp4-established                  Connection closed         
   warn
   6604750            tcp4-output                        Packets sent           
   info
         8            tcp4-output                        Resets sent            
   info
root@ip-10-21-120-238:~#
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