Cisco Cisco Packet Data Interworking Function (PDIF)
Service Configurations
▀ PDSN Service Configuration for L2TP Support
▄ IPSec Reference, StarOS Release 18
90
PDSN Service Configuration for L2TP Support
PDSN service configuration is required for compulsory tunneling and optional for attribute-based tunneling.
For attribute-based tunneling, a configuration error could occur such that upon successful authentication, the system
determines that the subscriber session requires L2TP but can not determine the name of the context in which the
appropriate LAC (L2TP Access Concentrator) service is configured from the attributes supplied. As a precautionary, a
parameter has been added to the PDSN service configuration options that will dictate the name of the context to use. It
is strongly recommended that this parameter be configured.
determines that the subscriber session requires L2TP but can not determine the name of the context in which the
appropriate LAC (L2TP Access Concentrator) service is configured from the attributes supplied. As a precautionary, a
parameter has been added to the PDSN service configuration options that will dictate the name of the context to use. It
is strongly recommended that this parameter be configured.
This section contains instructions for modifying the PDSN service configuration for either compulsory or attribute-
based tunneling.
based tunneling.
These instructions assume that the PDSN service was previously configured and system is ready to serve as a PDSN.
This section provides the minimum instruction set for configuring an L2TP service on the PDSN system. For more
information on commands that configure additional parameters and options, refer to the Command Line Interface
Reference.
information on commands that configure additional parameters and options, refer to the Command Line Interface
Reference.
To configure the PDSN service to support L2TP:
Step 1
Modify PDSN service to configure compulsory tunneling or attribute-based tunneling by applying the example
configuration in any of the following sections:
configuration in any of the following sections:
Step 2
Step 3
Save your configuration to flash memory, an external memory device, and/or a network location using the Exec mode
command save configuration. For additional information on how to verify and save configuration files, refer to the
System Administration Guide and the Command Line Interface Reference.
command save configuration. For additional information on how to verify and save configuration files, refer to the
System Administration Guide and the Command Line Interface Reference.
Modifying PDSN Service to Support Attribute-based L2TP Tunneling
Use the following example to modify an existing PDSN service to support attribute-based L2TP tunneling on your
system:
system:
configure
context ctxt_name
pdsn-service pdsn_svc_name
ppp tunnel-context lac_ctxt_name
end
Notes:
ctxt_name is the destination context where the PDSN service is configured.
pdsn_svc_name is name of the PDSN service for which you are configuring attribute-based L2TP tunneling.
lac_ctxt_name is the name of the destination context where the LAC service is located.