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▀ Supported LAC Service Configuration for Mobile IP
Figure 45.
1. A subscriber session from the FA is received by the HA service over the Pi interface.
2. The HA service attempts to authenticate the subscriber. The subscriber could be configured either locally or
remotely on a RADIUS server. Figure above shows subscriber authentication using a RADIUS AAA server.
3. The RADIUS server returns an Access-Accept message, which includes attributes indicating that session data is
to be tunneled using L2TP, and the name and location of the LAC service to use. An attribute could also be
provided indicating the LNS peer to connect to.
4. The HA service receives the information and then forwards the packets to the LAC service, configured within
the Destination context.
5. The LAC service, upon receiving the packets, encapsulates the information and forwards it to the appropriate
PDN interface for delivery to the LNS.
6. The encapsulated packets are sent to the peer LNS through the packet data network where they will be un-
encapsulated.
Configuring Attribute-based L2TP Support for HA Mobile IP
This section provides a list of the steps required to configure attribute-based L2TP support for use with HA Mobile IP
applications. Each step listed refers to a different section containing the specific instructions for completing the required
procedure.
Important:
sessions as an HA.
Step 1
Configure the subscriber profiles according to the information and instructions located in the Configuring Subscriber
Profiles for L2TP Support section of this chapter.
Step 2
Configure one or more LAC services according to the information and instructions located in the Configuring LAC
Services section of this chapter.
▄ Cisco ASR 5x00 Packet Data Network Gateway Administration Guide
396
Attribute-based L2TP Session Processing for MIP
These instructions assume that the system was previously configured to support subscriber data
L2TP Access Concentrator
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