Cisco Cisco Packet Data Gateway (PDG)
S2b interface. It also shows the network interfaces used by the Cisco MME, S-GW, and P-GW in the
E-UTRAN/EPC network.
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.
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.
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.
secure access, such as a WiFi, LTE metro, and femtocell access networks.
eNodeB
The eNodeB (evolved Node B) is the termination point for all radio-related protocols. As a network, E-UTRAN
is simply a mesh of eNodeBs connected to neighboring eNodeBs via the X2 interface.
is simply a mesh of eNodeBs connected to neighboring eNodeBs via the X2 interface.
ePDG Administration Guide, StarOS Release 19
3
Evolved Packet Data Gateway Overview
Network Elements