PDN Gateway Configuration
Configuring the System as a Standalone PMIP P-GW in an LTE-SAE Network ▀
Cisco ASR 5x00 Packet Data Network Gateway Administration Guide ▄
143
1.
The S-GW establishes the S5/S8 connection by sending a Create Session Request message to the P-GW
including an Access Point name (APN).
2.
The P-GW service determines which context to use to provide AAA functionality for the session. This process is
described in the
How the System Selects Contexts
section located in the
Understanding the System Operation
and Configuration
chapter of the
System Administration Guide
.
3.
The P-GW uses the configured Gx Diameter endpoint to establish the IP-CAN session.
4.
The P-GW sends a CC-Request (CCR) message to the PCRF to indicate the establishment of the IP-CAN session
and the PCRF acknowledges with a CC-Answer (CCA).
5.
The P-GW uses the APN configuration to select the PDN context. IP addresses are assigned from the IP pool
configured in the selected PDN context.
6.
The P-GW responds to the S-GW with a Create Session Response message including the assigned address and
additional information.
7.
The S5/S8 data plane tunnel is established and the P-GW can forward and receive packets to/from the PDN.
P-MIP P-GW (LTE) Configuration
To configure the system to perform as a standalone P-MIP P-GW in an LTE-SAE network environment, review the
following graphic and subsequent steps.
