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Configuring ISG Access for IP Subscriber
Sessions
First Published: December 5, 2006
Last Updated: November 25, 2009
Intelligent Services Gateway (ISG) is a Cisco IOS XE software feature set that provides a structured
framework in which edge devices can deliver flexible and scalable services to subscribers. ISG supports
IP sessions for subscribers who connect to ISG from routed, Layer 2 or Layer 3 access networks. This
module describes how to configure ISG to bring up IP subscriber sessions, manage subscriber IP
addressing, and configure dynamic Virtual Private Network (VPN) selection.
Note This document assumes that Network Address Translation is performed on a Layer 3 gateway other than
the ISG.
Finding Feature Information
For the latest feature information and caveats, see the release notes for your platform and software
release. To find information about the features documented in this module, and to see a list of the releases in
which each feature is supported, see the “Feature Information for ISG Access for IP Subscriber Sessions”
section on page 40.
Use Cisco Feature Navigator to find information about platform support and Cisco IOS XE software
image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on
Cisco.com is not required.
Contents
• Prerequisites for ISG Access for IP Subscriber Sessions, page 2
• Restrictions for ISG Access for IP Subscriber Sessions, page 2
• Information About ISG Access for IP Subscriber Sessions, page 3
• How to Configure ISG for IP Subscriber Sessions, page 13
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