Filtering Traffic in Bridged Environments

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Lab 25: OSPF Multiple Area Routing, Route Redistribution and Summarization ”Part I

Practical Scenario

As OSPF networks continue to grow, it becomes inevitable that the network will be broken into areas. Redistribution between routing protocols is also fairly common. When integrating a classful routing protocol with a classless routing protocol, an understanding of summarization is required. The following lab gives you practice in configuring multiple OSPF areas, virtual links, redistribution, and summarization.

Lab Exercise:

The Herpetology (Herp) Information Network or HIN, is a network of herpetologists exchanging biological and ecological information on several species of reptiles and amphibians. HIN has a Frame Relay network used to disperse information across the country. The network is in a constant state of flux and suffers from this continuous change. You have been given the task of fixing the current OSPF network and integrating it with an IGRP network. You must abide by the following design guidelines:

  • Configure an IP network as depicted in Figure 12-16, by using OSPF as the routing protocol and 2001 as the Autonomous System ID.

    Figure 12-16. HIN

    graphics/12fig16.gif

  • Configure the entire Frame Relay network as three point-to-point networks, as depicted in the figure.

  • Configure all the OSPF areas as denoted in the figure. The two Frame Relay point-to-point networks, between hin_hq, gecko, and tree_frog are in OSPF Area 0. The LAN interface of gecko is in OSPF Area 10, while the LAN interfaces of tree_frog and python are in OSPF Area 20. The serial interface of the python router and all the interfaces of the boa router are in OSPF Area 75.

  • Configure the Frame Relay point-to-point network between hin_hq and the chameleon router to be in the IGRP routing domain. Ensure full IP connectivity from the chameleon routers LAN interface to all of the OSPF networks and interfaces.

  • Configure three loopback interfaces on the chameleon router, and advertise this as a single OSPF route.

  • The gecko router must not have IP visibility to the LAN network on the boa router.

Lab Objectives

  • Configure the HIN as depicted in Figure 12-16. Configure IP as denoted in the diagram. The LAN topology type is not important in this lab.

  • Use the Frame Relay data link protocol on the WAN. Use only point-to-point networks as indicated on the diagram.

  • Ensure full IP connectivity to all IP interfaces ”that is, be sure that you can ping all Frame Relay and LAN interfaces from all routers. You might not use any static routes.

  • Do not change the default OSPF network type.

  • Configure the IGRP domain on the chameleon router. Ensure that this domain has full IP reachability to the entire OSPF network.

  • Configure and advertise three loopback networks on the chameleon router. These networks are 10.1.16.0/24, 10.1.17.0/24, and 10.1.18.0/24. Aggregate the networks into a single OSPF route.

  • Prevent the gecko router from reaching the network 10.1.70.1/24.

  • (Optional) Configure OSPF so that the tree_frog router will send OSPF hellos every 30 seconds.

Equipment Needed

  • Seven Cisco routers. Four will be connected through V.35 back-to-back cables or in a similar manner to a Frame Relay switch.

  • Two routers will be connected directly through V.35 back-to-back cables or in a similar manner.

  • Five LANs segments, provided through hubs or switches. The LAN topology is not significant to this lab.

Physical Layout and Prestaging

  • Connect the hubs and serial cables to the routers, as shown in Figure 12-16.

  • A Frame Relay switch with three PVCs also is required. Example 12-47 lists the Frame Relay configuration used in this lab. Note that this is the same Frame Relay switching configuration as in the previous lab exercise.

Example 12-47 Frame Relay Switch Configuration
  hostname frame_switch   !   frame-relay switching   !   <<<text omitted>>>   !   interface Serial0   no ip address   encapsulation frame-relay   no fair-queue   clockrate 148000   frame-relay intf-type dce   frame-relay route 111 interface Serial1 110   frame-relay route 121 interface Serial3 102   frame-relay route 150 interface Serial5 151   !   interface Serial1   no ip address   encapsulation frame-relay   clockrate 148000   frame-relay intf-type dce   frame-relay route 110 interface Serial0 111   !   interface Serial2   no ip address   shutdown   !   interface Serial3   no ip address   encapsulation frame-relay   clockrate 64000   frame-relay intf-type dce   frame-relay route 102 interface Serial0 121   !   interface Serial5   no ip address   encapsulation frame-relay   clockrate 64000   frame-relay intf-type dce   frame-relay route 151 interface Serial0 150  
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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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