PDN Gateway Overview
Network Deployment(s) ▀
Cisco ASR 5x00 Packet Data Network Gateway Administration Guide ▄
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Figure 6.
P-GW in the E-UTRAN/EPC Network Supporting the eHRPD Network
Supported Logical Network Interfaces (Reference Points)
The P-GW provides the following logical network interfaces in support of eHRPD to E-UTRAN/EPC connectivity:
S5/S8 Interface
This reference point provides tunneling and management between the S-GW and the P-GW, as defined in 3GPP TS
23.401. The S8 interface is an inter-PLMN reference point between the S-GW and the P-GW used during roaming
scenarios. The S5 interface is used between an S-GW and P-GW located within the same administrative domain (non-
roaming). It is used for S-GW relocation due to UE mobility and if the S-GW needs to connect to a non-collocated P-
GW for the required PDN connectivity.
Supported protocols
:
Transport Layer: UDP, TCP
Tunneling:
GTP: IPv4 or IPv6 GTP-C (signaling channel) and GTP-U (bearer channel)
PMIPv6: IPv6 GRE or IP-in-IP
Network Layer: IPv4, IPv6
Data Link Layer: ARP
Physical Layer: Ethernet