Lab 6-2 Using the AS_PATH Attribute  

Friday, November 14, 2008

Learning Objective
In this lab, you will use BGP commands to prevent private AS numbers from being advertised to the outside world. You will also use the AS_PATH attribute to
filter BGP routes based on their source AS numbers.


The International Travel Agency’s ISP has been assigned an AS number of 300.This provider uses BGP to exchange routing information with several customernetworks. Each customer network is assigned an AS number from the privaterange, such as AS 65000. Configure ISP to remove the private AS numberswithin the AS_Path information from 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.

router configs to follow

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