0000 Instance: 0 [Link direction: MS to network (0)] Extension: True .000 = Configuration Protocol: PPP for use with IP PDP type or IP PDN type (0) > Protocol or Container ID: PDU session ID (0x001a) Protocol or Container ID: P-CSCF IPv6 Address Request (0x0001) [Response In: 56501 Figure 7.32 - Packet capture ePDG to SMF Create Session Request Summary The packet capture below shows the Create Session Response that is sent from SMF to ePDG. You can have a glance at the message structure and information elements within it that is sent across to the ePDG. SMF-ePDG [2] Create Session Response GPRS Tunneling Protocol V2 Flags: 0x48 Message Type: Create Session Response (33) Message Length: 185 Tunnel Endpoint Identifier: 0x86050012 (2248474642) Sequence Number: 0x0010685b (1075291) Spare: 0 > Cause : Request accepted (16) > Fully Qualified Tunnel Endpoint Identifier (F-TEID) : S2b PGW GTP-C interface, TEID/GRE Key: 0x020000f9, IPv4 10.193.25.1 PDN Address Allocation (PAA) : IPv6 2001:4870:e00b:7434:214:22ff:fe01:2345 > APN Restriction : No Existing Contexts or Restriction (0) > Bearer Context : [Grouped IE] > Recovery (Restart Counter) : 0 Additional Protocol Configuration Options (APCO) : IE Type: Additional Protocol Configuration Options (APCO) (163) IE Length: 60 = CR flag: 0 0000 Instance: 0 [Link direction: Network to MS (1)] = Extension: False .000 = Configuration Protocol: PPP for use with IP PDP type or IP PDN type (0) Protocol or Container ID: P-CSCF IPv6 Address (0x0001) > Protocol or Container ID: QoS rules (0x001c) > Protocol or Container ID: Session-AMBR (0x001d) Protocol or Container ID: QoS flow descriptions (0x001f) > Protocol or Container ID: S-NSSAI (0x001b) [Response To: 4583 [Response Time: 3.256308000 seconds] Figure 7.33 - Packet capture ePDG to SMF Create Session Response In this section, we have delved into the details of establishing a Wi-Fi session. This explains the interworking of WLAN technology with the 5G core network. This enables a 5G/4G network support handover between 4G/5G and WLAN