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    <p>Hi Alexey</p>
    <p>   I run udp4[6]_ipsec_vti always fail. when client /server
      message size is 65463 <br>
    </p>
    <p>then timeout will happen. I try to modify the client/server
      message size then run<br>
    </p>
    <p>this case and find the size is less than 1428 the case running is
      ok.  But I do not know</p>
    <p>why the threshold size is 1428.  can you  tell me the reason of
      this failure.<br>
    </p>
    <p>the test log is below:                             <br>
    </p>
    <p><<test_start>>>                                                                                                                              
      <br>
      tag=udp4_ipsec_vti01
stime=1519695625                                                                                                         
      <br>
      cmdline="udp_ipsec_vti.sh -p ah -m tunnel -s "100 1000
65463""                                                                                
      <br>
contacts=""                                                                                                                                   
      <br>
analysis=exit                                                                                                                                 
      <br>
<<<test_output>>>                                                                                                                             
      <br>
      incrementing
stop                                                                                                                             
      <br>
      udp_ipsec_vti 1 TINFO: Network config (local --
remote):                                                                                      
      <br>
      udp_ipsec_vti 1 TINFO: eth1 --
eth1                                                                                                           
      <br>
      udp_ipsec_vti 1 TINFO: 192.168.100.42/24 --
192.168.100.117/24                                                                                
      <br>
      udp_ipsec_vti 1 TINFO: fd00:1:1:1::1/64 --
fd00:1:1:1::2/64                                                                                   
      <br>
      udp_ipsec_vti 1 TINFO: Test vti +
IPsec[ah/tunnel]                                                                                            
      <br>
      udp_ipsec_vti 1 TINFO: Add IPs to vti tunnel,  loc: 10.23.1.1/30,
      rmt:
      10.23.1.2/30                                                           
      <br>
      udp_ipsec_vti 1 TINFO: run server 'netstress -T udp -R 500000 -g
42456'                                                                       
      <br>
      udp_ipsec_vti 1 TINFO: check that server port in 'LISTEN'
state                                                                               
      <br>
      udp_ipsec_vti 1 TINFO: run client 'netstress -l -T udp -H
      10.23.1.2 -n 100 -N 100 -a 2 -r 500 -d tst_netload.res -g
      42456'                     <br>
      udp_ipsec_vti 1 TPASS: netstress passed, time spent '47'
ms                                                                                   
      <br>
      udp_ipsec_vti 2 TINFO: run server 'netstress -T udp -R 500000 -g
50062'                                                                       
      <br>
      udp_ipsec_vti 2 TINFO: check that server port in 'LISTEN'
state                                                                               
      <br>
      udp_ipsec_vti 2 TINFO: run client 'netstress -l -T udp -H
      10.23.1.2 -n 1000 -N 1000 -a 2 -r 500 -d tst_netload.res -g
      50062'                   <br>
      udp_ipsec_vti 2 TPASS: netstress passed, time spent '51'
ms                                                                                   
      <br>
      udp_ipsec_vti 3 TINFO: run server 'netstress -T udp -R 500000 -g
46465'                                                                       
      <br>
      udp_ipsec_vti 3 TINFO: check that server port in 'LISTEN'
state                                                                               
      <br>
      udp_ipsec_vti 3 TINFO: run client 'netstress -l -T udp -H
      10.23.1.2 -n 65463 -N 65463 -a 2 -r 500 -d tst_netload.res -g
      46465'                 <br>
      tst_test.c:980: INFO: Timeout per run is 0h 05m
00s                                                                                           
      <br>
      netstress.c:777: INFO: max requests
'500000'                                                                                                  
      <br>
      netstress.c:803: INFO: using
UDP                                                                                                              
      <br>
      netstress.c:582: INFO: assigning a name to the server
socket...                                                                               
      <br>
      tst_test.c:980: INFO: Timeout per run is 0h 05m
00s                                                                                           
      <br>
      netstress.c:756: INFO: connection: addr '10.23.1.2', port
'46465'                                                                             
      <br>
      netstress.c:757: INFO: client max req:
500                                                                                                    
      <br>
      netstress.c:758: INFO: clients num:
2                                                                                                         
      <br>
      netstress.c:763: INFO: client msg size:
65463                                                                                                 
      <br>
      netstress.c:764: INFO: server msg size:
65463                                                                                                 
      <br>
      netstress.c:771: INFO: max timeout errors
12                                                                                                  
      <br>
      netstress.c:696: INFO: set '/proc/sys/net/ipv4/tcp_tw_reuse' to
      '1'<br>
      netstress.c:803: INFO: using UDP<br>
      netstress.c:407: INFO: Running the test over IPv4<br>
      netstress.c:353: WARN: client exit on '0' request<br>
      netstress.c:426: BROK: client[1] failed: No message of desired
      type<br>
      netstress.c:161: INFO: unset '/proc/sys/net/ipv4/tcp_tw_reuse'
      back to '0'<br>
      <br>
      Summary:<br>
      passed   0<br>
      failed   0<br>
      skipped  0<br>
      warnings 1<br>
      udp_ipsec_vti 3 TFAIL: expected 'pass' but ret: '1</p>
    <p>That's all</p>
    <p>Thanks</p>
    <p>Lianwen Sun<br>
    </p>
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