Cisco Cisco Packet Data Interworking Function (PDIF)
Evolved Packet Data Gateway Overview
Network Deployment(s) and Interfaces ▀
ePDG Administration Guide, StarOS Release 17 ▄
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Network Deployment(s) and Interfaces
This section describes the ePDG as it provides secure access from the WLAN UEs to the Cisco P-GW and a connection
to the PDN (Packet Data Network) in the E-UTRAN/EPC (Evolved UTRAN/Evolved Packet Core) network.
to the PDN (Packet Data Network) in the E-UTRAN/EPC (Evolved UTRAN/Evolved Packet Core) network.
The figure below shows the ePDG terminating the SWu interface from the untrusted non-3GPP IP access network and
providing secure access to the Cisco P-GW and a connection to the PDN via the PMIPv6/GTPv2 S2b interface. It also
shows the network interfaces used by the Cisco MME, S-GW, and P-GW in the E-UTRAN/EPC network.
providing secure access to the Cisco P-GW and a connection to the PDN via the PMIPv6/GTPv2 S2b interface. It also
shows the network interfaces used by the Cisco MME, S-GW, and P-GW in the E-UTRAN/EPC network.
Figure 1.
The ePDG in the E-UTRAN/EPC Network
Network Elements
This section provides a description of the network elements that work with the ePDG in the E-UTRAN/EPC network.
For untrusted non-3GPP IP access, note that the network architecture assumes the access network elements do not
perform any function other than delivering packets.
For untrusted non-3GPP IP access, note that the network architecture assumes the access network elements do not
perform any function other than delivering packets.
ePDG
The ePDG is responsible for interworking between the EPC and untrusted non-3GPP networks that require secure
access, such as a WiFi, LTE metro, and femtocell access networks.
access, such as a WiFi, LTE metro, and femtocell access networks.