C H A P T E R 1
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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