[strongSwan] Issue with tunnel establishment under high load

Chinmaya Dwibedy ckdwibedy at yahoo.com
Tue May 27 16:12:07 CEST 2014

Using the
load tester plugin of strongswan (5.0.4), could able to achieve the 250k IPsec
tunnels with 1000 tunnels per second. However I found that, some of the tunnels
(approximately 10-20) were not getting up. Upon debugging found that, at IKE
responder end, the checkout_by_message() of ike_sa_manager_t does not return
pointer to ike_sa_t for some of the IKE_SA_INIT request messages (in execute()
routine of job). But if I reduce the setup rate to 200, all the tunnels come
up. Is it an bug with strongswan 5.0.4 in high load? Can anyone please suggest
what might be the issue? Thanks in advance for your support.
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