CCIE Practical Studies, Volume I

Lab 19: Configuring Classical IP Using SVCs on Cisco 7XXX Routers, RFC 2225 ”Part I

Practical Scenario

Classical IP reduces many configuration steps, such as the necessity to perform manual mapping between Layer 3 addressing and ATM. This lab demonstrates the use of SVCs as well.

Lab Exercise

You are running an IP-based network that extends through the ATM cloud. You must interconnect various sites. The ATM network is SVC-based. Your service provider is not giving the details of SVC addressing. Therefore, you decided to learn the address prefixes from the provider's ingress ATM switch by using ILMI. Furthermore, you want to use Classical IP. You are running the EIGRP routing protocol. You need to maintain the following guidelines in your implementation:

• Use EIGRP as the routing protocol with autonomous system 100.

• Assign ESI portions of the NSAP address.

• Establish signaling and ILMI PVCs.

• Assign the ATM ARP server function to R2. Other routers are clients .

• Maintain a fully meshed topology.

Lab Objectives

At the end of the lab, you will complete the following:

• Enable Classical IP of the SVC network (RFC 2225).

• Configure the ARP server and client (RFC 2225).

• Implement a single logical IP subnet (LIS).

Equipment Needed

The lab uses five routers and one ATM switch. For CCIE preparation, it is sufficient to obtain two routers interfacing through the ATM network. To summarize, you need the following equipment:

• At least five routers with ATM interfaces

• One LS1010 ATM switch

Physical Layout and Prestaging

• Connect the routers to the ATM switch, as shown in Figure 8-9.

  Figure 8-9. Classical IP

• Note that although Figure 8-9 shows five routers, you can perform a similar exercise by using only two routers interconnected through the ATM network.

Figure 8-9 illustrates the network diagram and addressing scheme used in this lab.