Table Of Contents

Planning to Configure the GGSN

Prerequisites

Restrictions

Supported Platforms

Supported Standards, MIBs, and RFCs

Related Documents

Planning to Configure the GGSN

---

This chapter describes information that you should know before configuring the Gateway General Packet Radio Service (GPRS) Support Node (GGSN).

This chapter includes the following sections:

•Prerequisites

•Restrictions

•Supported Platforms

•Supported Standards, MIBs, and RFCs

•Related Documents

Prerequisites

Planning Your Access Point Configuration

Before you begin to configure the GGSN on your router, you should know which networks your mobile users will be allowed to access using the GGSN. Once you identify the networks, you can plan the physical interfaces to configure on the router for those networks. Then you can plan the associated access points to those networks and configure them on the GGSN.

For example, you might want to provide user access to the World Wide Web through a PDN, plus access to two private corporate intranets. In this case, you need to set up three access points—one to enable user access to the PDN, and one for each private intranet.

Restrictions

Before configuring GGSN, please note the following:

•By default, Cisco Express Forwarding (CEF) switching is enabled in GPRS Release 1.4 in Cisco IOS Release 12.2 and earlier. However, CEF is not supported in GPRS Release 1.4 in Cisco IOS Release 12.2 and earlier. Therefore, ensure that CEF is not configured on your GGSN router by issuing the no ip cef command while in global configuration mode.

•The following list shows the maximum number of PDP contexts that are supported on the GGSN according to the router series and amount of memory:

–Cisco 7206 router with 128Mb RAM—45,000 PDP contexts.

–Cisco 7206 VXR NPE-300 router with 256 Mb RAM—90,000 PDP contexts.

Supported Platforms

To identify the hardware platform or software image information associated with the GPRS feature, use the Feature Navigator on Cisco.com to search for information about the feature, or refer to the software release notes for a specific release. For more details on how to use the Feature Navigator, see the "Identifying Platform Support for Cisco IOS Software Features" section in the 
"Using Cisco IOS Software" chapter.

Supported Standards, MIBs, and RFCs

Standards

GPRS Release 1.4 supports the following ETSI standards:

•GSM 02.60 v6.3.0

•GSM 03.6.0 v6.7.0

•GSM 04.08 v6.9.0

•GSM 09.60 v6.6.0

•GSM 09.61 v6.4.0

•GSM 12.15 v7.1.0

The GPRS Gn interface complies with SMG#31 R97, and the Ga interface complies with SMG#29 R98 (12.15 v7.1.0).

MIBs

•CISCO-GPRS-ISGSN-MIB

•CISCO-GPRS-L2RLY-MIB

•CISCO-GPRS-GTP-MIB

For descriptions of other supported MIBs and how to use MIBs, see the Cisco MIB web site on CCO at http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml.

RFCs

None.

Related Documents

•Cisco IOS Interface Configuration Guide

•Cisco IOS Interface Command Reference

•Cisco IOS IP Configuration Guide

•Cisco IOS IP Command Reference, Volume 1 of 3: Addressing and Services

•Cisco IOS IP Command Reference, Volume 2 of 3: Routing Protocols

•Cisco IOS IP Command Reference, Volume 3 of 3: Multicast

•Cisco IOS Security Configuration Guide

•Cisco IOS Security Command Reference