Section: 8.2.5 Control Plane for trusted non-3GPP Access
Content: Figure 8.2.5-1: Control Plane before the NWt connection is established between UE and TNGF Figure 8.2.5-2: Control Plane after the NWt connection is established between UE and TNGF Large NAS messages may be fragmented by the "inner IP" layer or by TCP. Figure 8.2.5-3: Control Plane for establishment of user-plane via TNGF In the above figures 8.2.5-2 and 8.2.5-3, the UDP protocol may be used between the UE and TNGF to enable NAT traversal for IKEv2 and IPsec traffic. The NWt connection is defined in clause 4.2.8.3 and in clause 4.12a.2.2 of TS 23.502[ Procedures for the 5G System (5GS) ]  [3].