3.7.g Implement and troubleshoot AS path manipulations

3.7.g [ii] Prepend

AS-path prepending is configured in Cisco IOS with route-map based per-neighbor outbound filter. The actual prepending is specified within the route-map with the set as-path prepend command.

Adam, Paul (2014-07-12). All-in-One CCIE V5 Written Exam Guide (Kindle Locations 4092-4095).  . Kindle Edition.

http://evilrouters.net/2009/03/07/using-as-path-prepending-to-influence-inbound-routing/