CCNPv6_ROUTE_Lab6-2_BGP_AS_PATH_Instructor.pdf

All contents are Copyright ? 1992–2010 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 1 of 10 CCNPv6 ROUTE Chapter 6 Lab 6-2, Using the AS_PATH Attribute Instructor Version Topology Objectives ? Use BGP commands to prevent private AS numbers from being advertised to the outside world. ? Use the AS_PATH attribute to filter BGP routes based on their source AS numbers. Background The International Travel Agency’s ISP has been assigned an AS number of 300. This provider uses BGP to exchange routing information with several customer networks. Each customer network is assigned an AS number from the private range, such as AS 65000. Configure the ISP router to remove the private AS numbers from the AS Path information of CustRtr. In addition, the ISP would like to prevent its customer networks from receiving route information from International Travel Agency’s AS 100. Use the AS_PATH attribute to implement this policy. CCNPv6 ROUTE All contents are Copyright ? 1992–2010 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 2 of 10 Note: This lab uses Cisco 1841 routers with Cisco IOS Release 12.4(24)T1 and the Advanced IP Services image c1841-advipservicesk9-mz.124-24.T1.bin. You can use other routers (such as 2801 or 2811) and Cisco IOS Software versions, if they have comparable capabilities and features. Depending on the router model and Cisco IOS Software version, the commands available and output produced might vary from what is shown in this lab. Required Resources ? 3 routers (Cisco 1841 with Cisco IOS Release 12.4(24)T1 Advanced IP Services or comparable) ? Serial and console cables Step 1: Prepare the routers for the lab. Cable the network as shown in the topology diagram. Erase the startup configuration and reload each router to clear previous configurations. Step 2: Configure the hostname and interface addresses. a. You can copy and paste the followin