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C H A P T E R
Service Selection Gateway Overview
The Service Selection Gateway feature, available in Cisco IOS Release 12.2(16)BX or later, offers a
switching solution to service providers. Working in conjunction with the Cisco Subscriber Edge Services
Manager (SESM), SSG provides subscriber authentication, service selection, and service connection
capabilities to subscribers of Internet services. Subscribers interact with the SESM web application
using a standard Internet browser.
This chapter provides an overview of the Service Selection Gateway feature available on the
Cisco 10000 series router.
Service Selection Gateway
The Cisco 10000 series router supports the Service Selection Gateway (SSG) feature in Cisco IOS
Release 12.2(16)BX or later. SSG is a switching solution for service providers who offer intranet,
extranet, and Internet connections to subscribers using broadband access technology such as digital
subscriber lines (DSL) lines, cable modems, or wireless to allow simultaneous access to network
services. SSG provides connectivity to corporate networks and differential service selection to users with
access to multiple simultaneous services. Users can dynamically connect to and disconnect from any of
the services available to them.
Figure 1-1
shows an example of an SSG topology. In the figure, a single user connects to the
Cisco 10000 series router using an access protocol such as PPP, RBE, or IP. SSG resides in the router
that serves as a broadband aggregator. The router acts as a central control point for Layer 2 and Layer 3
services, including services available through ATM virtual circuits (VCs), virtual private dial-up
networks (VPDNs), and normal routing methods. The user can concurrently connect to a number of
different services, which can be private or public services. Connections to the services are established
using IP.
Cisco 10000 Series Router Service Selection Gateway Configuration Guide
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OL-4387-02
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