Using strongswan configuration site to site VPN

 
 
 reference 
 
 Aug 10 10:49:27 VM_0_2_centos strongswan [6502] : no config named 'site_to_site_1' 
Aug 10 10:49:27 VM_0_2_centos ipsec_starter [6502] : [5 b blob data] 
Aug 10 11:04:57 VM_0_2_centos strongswan [6502] : the configuration 'site_to_site_1' not found 
Aug 10 11:04:57 VM_0_2_centos ipsec_starter [6502] : the configuration 'site_to_site_1' not found 
Aug 10 11:04:57 VM_0_2_centos ipsec_starter [6502] : 
Aug 10 11:04:57 VM_0_2_centos strongswan [6502] : no config named 'site_to_site_1' 
Aug 10 11:04:57 VM_0_2_centos ipsec_starter [6502] : no config named 'site_to_site_1' 
Aug 10 11:04:57 VM_0_2_centos ipsec_starter [6502] : 
Aug 10 11:05:17 VM_0_2_centos strongswan [6502] : Charon stopped after 200 ms 
Aug 10 11:05:17 VM_0_2_centos strongswan [6502] : ipsec starter stopped 
 
 

I ask you, how to deal with