IKEv2 issues (ID_R)

Hi everyone

I’ve got some issues connection a Zyxel ATP200 and a SXT LTE6 (CGNAT).

I’m trying to establish a simple IKEv2 connection between these devices. They seem to see each other, but the connection never establishes.

LOG SXT attached: SXT_IKEv2_Issues.txt
SXT Conf: ROS_CONF.txt
ZyXEL Config: ZyXEL.txt

Does anyone have an idea what I could check/verify?
ZYXEL.txt (2.13 KB)
ROS_CONF.txt (673 Bytes)
SXT_ikev2_issues.txt (60.2 KB)