The Big show and Big D for Frame Relay

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Lab 11: Configuring PPP, CHAP, and LQM over Synchronous Links ”Part I

Practical Scenario

PPP CHAP provides secure authentication for peer-to-peer networking sessions over many types of media. As mentioned earlier, PPP is used over serial, asynchronous, ISDN, and DSL, as well as other media types. Today, PPP is even becoming the encapsulation for some LAN-based networks. Again, this is mainly because of the peer-to-peer authentication that PPP provides.

Lab Exercise

The Skynet testing facility just upgraded its Internet connection to T1. The date of the install coincides with the release of a couple of big Internet games . Skynet views this as the perfect time to stress test the new link. You have the task to provide a quick and secure connection to the Internet. Use the following parameters as your design guidelines:

  • Use PPP as your data-link protocol. The host name of the ISP router is isp_router. The CHAP password is 2diablo2. Use CHAP authentication.

  • At this time, this is Skynet's only link to the Internet and is the only route out of the Skynet network.

  • Configure the link so that it will not tolerate a 40 percent packet loss.

Lab Objectives

  • Configure the access server and network, as depicted in Figure 4-10.

    Figure 4-10. Skynet Testing Facility PPP Serial Connection Access to an ISP

    graphics/04fig10.gif

  • Use PPP with CHAP as the data-link protocol on the synchronous link to the ISP.

  • Enforce Link Quality Management on the link.

  • Optional: There is a DNS server for the ISP; its address is 128.200.1.2. Configure the skynet_lab router to use this DNS server. That is, you should be able to ping www.cisco.com when logged on to the skynet_lab router. This might or might not be difficult to test, depending on your lab. What is most important is the correct configuration in the router to forward DNS requests .

Equipment Needed

  • Two Cisco routers, connected through V.35 back-to-back cables or in a similar manner

  • Two LAN segments, provided through hubs or switches

  • One optional workstation functioning as a DNS server

Physical Layout and Prestaging

  • Connect the hubs and serial cables to the routers, as shown in Figure 4-10.

  • Connect two Ethernet hubs to form two LAN segments, as shown in Figure 4-10.

  • Optionally connect and configure a DNS server on the ISP LAN segment.

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CCIE Practical Studies, Volume I
CCIE Practical Studies, Volume I
ISBN: 1587200023
EAN: 2147483647
Year: 2001
Pages: 283
Authors: Karl Solie

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