It is only necessary to complete the BGP configuration steps outlined below.

SIMULATION
Network topology exhibit

Certkiller .com recently issued a contract to ISP (AS 65020) to provide a second Internet connection their Boston location. A new router, Certkiller 3, will need to be configured to connect to the Internet Service Providers. It is necessary to configure this router to exchange routes with both ISPs, and to filter the routing advertisements out to the ISPs. The basic configuration for the new router has been entered. It is only necessary to complete the BGP configuration steps outlined below.
On the Certkiller 3 router:
Configure BGP to exchange routes with ISP-A (AS 65010). Configure BGP to exchange routes with ISP-B (AS 65020). Only announce the two local Ethernet LAN prefixes (172.16.1.0/24 and 172.16.2.0/24) to the ISPs.
Configure the appropriate as-path access-list to permit only locally originated routes to be advertised in outbound routing updates to the ISPs. Use aspatch ACL number 10 containing only one statement. Start the simulation by clicking on the local host icon.
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