[strongSwan] OS X 10.11 and IKEv2

[Laurens Vets]

Hello list,

I have a strongSwan server configured and using IKEv2 on my iOS device 
(9.3.1) works perfectly with IKEv2. When I use the same settings on my 
Mac when I configure IKEv2, I see the following messages in 
/var/log/system.log when I try to connect:

Apr  3 19:44:13 Cerberus nesessionmanager[40856]: 
NESMIKEv2VPNSession[VPN (IKEv2):33BAFDF0-6B95-4AB2-982A-A7B7B3120C85]: 
Received a start command from SystemUIServer[481]
Apr  3 19:44:13 Cerberus nesessionmanager[40856]: 
NESMIKEv2VPNSession[VPN (IKEv2):33BAFDF0-6B95-4AB2-982A-A7B7B3120C85]: 
status changed to connecting
Apr  3 19:44:13 Cerberus nesessionmanager[40856]: Failed to find the 
VPN app for plugin type com.apple.neplugin.IKEv2
Apr  3 19:44:13 Cerberus neagent[41085]: IKEv2 Plugin: 
ikev2_resolve_server_name: failed to query DNS
Apr  3 19:44:13 Cerberus neagent[41085]: IKEv2 Plugin: Connect: Attempt 
to query DNS failed
Apr  3 19:44:13 Cerberus nesessionmanager[40856]: 
NESMIKEv2VPNSession[VPN (IKEv2):33BAFDF0-6B95-4AB2-982A-A7B7B3120C85]: 
status changed to disconnecting
Apr  3 19:44:13 Cerberus nesessionmanager[40856]: 
NESMIKEv2VPNSession[VPN (IKEv2):33BAFDF0-6B95-4AB2-982A-A7B7B3120C85]: 
status changed to disconnected, last stop reason Failed to resolve the 
server address

I see no connection attempt on the server at all.

Any idea what might be going? For the record, I have no other 
connection problems on this machine.

Thanks in advance!