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Cisco 10000 Series Router Service Selection Gateway Configuration Guide
OL-4387-02
Chapter 1 Service Selection Gateway Overview
SSG Prerequisites
SSG Prerequisites
The SSG feature has the following prerequisites:
• The Cisco 10000 series router must be running Cisco IOS Release 12.2(16)BX or later.
• The performance routing engine (PRE), part number ESR-PRE2 must be installed in the router
chassis. The PRE performs all Layer 2 and Layer 3 packet manipulation related to routing and
forwarding operations. Use the show version command to verify that you have the correct PRE
version installed.
• If you want to perform Layer 3 service selection, you must install and configure the Cisco
Subscriber Edge Services Manager (SESM) as described in the Cisco Subscriber Edge Services
Manager and Subscriber Policy Engine Installation and Configuration Guide, Release 3.1(1).
For information about the prerequisites for a specific SSG feature, see the appropriate chapter in this
guide.
SSG Architecture Model
Figure 1-2 shows a Service Selection Gateway (SSG) model.
Figure 1-2 Service Selection Gateway Topology
WAP
PC
Notebook
97064
Open
garden
PDA
Corporate
VPN
SSG
GGSN
Wireless LAN
DSL
Subscriber access media
Internet
Services selection
Services
Gaming
SESM
AAA
Directory
Server