Prerequisites For Isg Access For Ppp Sessions; Restrictions For Isg Access For Ppp Sessions; Information About Configuring Isg Access For Ppp Sessions - Cisco IOS XE Intelligent Services Configuration Manual

Prerequisites for ISG Access for PPP Sessions

Prerequisites for ISG Access for PPP Sessions
For information about release and platform support, see the
Sessions" section on page
The specific access protocol that is being used must be provisioned on the interface.
If local PPP authentication is required, the ppp authentication command must be configured on the
interface or virtual template.
The tasks and examples in this document assume that you know how to configure and use ISG control
policies. See the module "Configuring ISG Control Policies" for information about how configure
control policies.

Restrictions for ISG Access for PPP Sessions

In Cisco IOS XE, SSO and ISSU are not supported for the following features on ISG PPP sessions:
•
•
•
•

Information About Configuring ISG Access for PPP Sessions

Before you configure access for PPP sessions, you should understand the following concepts:
•
•
•
•
Overview of ISG Access for PPP Sessions
Layer 2 sessions are established by means of control protocols that operate between the peer entities and
the ISG device. Typically, Layer 2 sessions are encapsulated to isolate them from other sessions on the
same physical media.
Although the system provides default handling for Layer 2 sessions, you may want to configure policies
to forward or locally terminate the protocol or to locally authenticate subscribers on the basis of identity
data that is collected from the access protocol. ISG control policies can be configured to extract identity
and credentials of peer entities from access protocols. This mechanism allows services to be provisioned
for Layer 2 sessions on the basis of any identity pertaining to the session, whether explicitly provided
via the protocol or native to the underlying media or access port.
ISG supports the following Layer 2 access protocols:
•
•
2
13.
Port-Bundle Host Key
Layer 4 Redirect
Traffic Class
Accounting
Overview of ISG Access for PPP Sessions, page 2
ISG Subscriber IP Address Management for PPP Sessions, page 3
VRF Transfer for PPP Sessions, page 3
Default Policy for ISG Access for PPP Sessions, page 3
PPP
PPP over Ethernet (PPPoE)
Configuring ISG Access for PPP Sessions
"Feature Information for ISG Access for PPP