[strongSwan] Data transfer stops

[Yuri Е. Gutnikov]

Hi, all.

The situation is next:

I make connection between two hosts with Strongswan 5.5.3 on both sides. 
I use IKE v.2 To increase rekey events rate, I use short lifetime params:

         ikelifetime=6m
         lifetime=2m
         margintime=20s

After the connection is successfully established, I begin to send data 
using iperf. After about 300 s. data transfer stops. There are next 
records in log files:

07[MGR] checkin and destroy of IKE_SA successful
01[JOB] got event, queuing job for execution
01[JOB] next event in 226ms, waiting
13[JOB] CHILD_SA {559} not found for delete
01[JOB] got event, queuing job for execution
01[JOB] next event in 184ms, waiting
09[MGR] checkout IKEv2 SA with SPIs c7fdef6e163f293a_i 8e5d1a9aaf12f106_r
09[MGR] IKE_SA checkout not successful
01[JOB] got event, queuing job for execution
01[JOB] next event in 287ms, waiting
11[MGR] checkout IKEv2 SA with SPIs c7fdef6e163f293a_i 8e5d1a9aaf12f106_r
11[MGR] IKE_SA checkout not successful
..........................................................................

..........................................................................

03[JOB] IKE_SA to rekey not found

When I use old Strongswan 5.3 (with old rekey scheme), I don't have such 
problem.

All config  files are in attachments.

Sincerely,

Yuri Gutnikov
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