Cisco 7100 Series Spezifikationen PDF herunterladen (Seite 74)

Scenario Description

Cisco 7100 Series VPN Configuration Guide

4-2

Scenario Description

The extranet scenario introduced in Figure 4-1 builds on the intranet scenario introduced in

Chapter 3, “Intranet VPN Business Scenario,”by providing a business partner access to the

same headquarters network. In the extranet scenario, the headquarters and business partner

are connected through a secure IPSec tunnel and the business partner is given access only

to the headquarters public Web server to perform various IP-based network tasks, such as

placing and managing product orders.

Figure 4-1 Extranet VPN Business Scenario

Figure 4-2 shows the physical elements of the scenario. As in the intranet business scenario

explained in Chapter 3, “Intranet VPN Business Scenario,” the Internet provides the core

interconnecting fabric between the headquarters and business partner routers. Like the

headquartersofﬁce,the businesspartneris also usinga Cisco 7140-2T3 asagatewayrouter,

which has two high-speed synchronous serial T3 interfaces, two Fast Ethernet

10/100BaseT autosensing interfaces, and one Integrated Service Module (ISM) installed.

The ISM provides hardware-based encryption for all interfaces installed in the router,

including the IP Security Protocol (IPSec) tunneling services for the serial connection

between the headquarters and business partner routers.

Corporate

Intranet

Headquarters

router (hq-sanjose)

Remote office

router (ro-rtp)

Remote

office

network

Internet

Serial line Serial line

GRE tunnel

24219

Business partner

router (bus-ptnr)

Internet

Serial line

IPSec tunnel

Business

partner

network

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Cisco 7100 Series Spezifikationen Seite 74