<div dir="ltr">Please find the output attached for "ip -s x p" on the server.<div><br></div><div>There are in total 11 clients. 10 clients from one machine using load-tester plugin and 1 from my IOS device. IP addresses :</div><div><br><div><div><div> inet <a href="http://10.10.2.1/32">10.10.2.1/32</a> scope global eth0</div><div> inet <a href="http://10.10.2.7/32">10.10.2.7/32</a> scope global eth0</div><div> inet <a href="http://10.10.2.10/32">10.10.2.10/32</a> scope global eth0</div><div> inet <a href="http://10.10.2.6/32">10.10.2.6/32</a> scope global eth0</div><div> inet <a href="http://10.10.2.8/32">10.10.2.8/32</a> scope global eth0</div><div> inet <a href="http://10.10.2.5/32">10.10.2.5/32</a> scope global eth0</div><div> inet <a href="http://10.10.2.4/32">10.10.2.4/32</a> scope global eth0</div><div> inet <a href="http://10.10.2.2/32">10.10.2.2/32</a> scope global eth0</div><div> inet <a href="http://10.10.2.3/32">10.10.2.3/32</a> scope global eth0</div><div> inet <a href="http://10.10.2.9/32">10.10.2.9/32</a> scope global eth0</div></div><div><br></div><div>When this condition happens, both the CPU's are 99% idle. I have to wait for minutes for this situation to clear up and sometimes it might not clear up at all!</div></div></div><div><br></div><div>thanks,</div><div><br></div><div>Meenakshi</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Feb 23, 2015 at 3:55 PM, Noel Kuntze <span dir="ltr"><<a href="mailto:noel@familie-kuntze.de" target="_blank">noel@familie-kuntze.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
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<br>
Hello meenakshi,<br>
<br>
Did you check if the IPsec SAs are still there for the tunnels, when you<br>
get timeouts? I would like to get some information on the state of the<br>
ipsec stack when that happens. Stuff like the statistics of the policies<br>
("ip -s x p") and the CPU usage. This is likely a problem with the IPsec stack of the<br>
Linux kernel, as it does traffic processing.<br>
<br>
Mit freundlichen Grüßen/Regards,<br>
Noel Kuntze<br>
<br>
GPG Key ID: 0x63EC6658<br>
Fingerprint: 23CA BB60 2146 05E7 7278 6592 3839 298F 63EC 6658<br>
<br>
Am 20.02.2015 um 23:22 schrieb meenakshi bangad:<br>
<div><div class="h5">> I am experiencing a very interesting behaviour with Strongswan server.<br>
><br>
> Using the load tester plugin I can bring up multiple clients. I have set up about 200 clients on 2 machines (each running 100 Ipsec tunnels to the servers).<br>
> I have my own traffic generator which is sending traffic across this multiple tunnels.<br>
><br>
> Initially everything runs fine, but after some time I start getting time-outs in my traffic generator application. I have tried modifying the sysctl settings etc,<br>
> but nothing has worked. If during that time I bring up another client everything starts to work back again. So the trigger to non -responsive server is brining a tunnels up and down. Since<br>
> I have been doing this the generator on the other 200 tunnels never times out. It seems like the server is stuck somewhere and the a tunnel up or down breaks that loop.<br>
><br>
> Has anyone else experiencing the same behaviour ?<br>
><br>
> Thanks,<br>
><br>
> Meenakshi<br>
><br>
><br>
><br>
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