Can I make Sprint prepend my route(s) to certain Autonomous Systems?
A. Yes. Sprint provides a mechanism for prepending your routes with 1239 to select eBGP peers. Simply send community 6500#:AS, where # is the number of times 1239 will appear in the AS-PATH and AS is the AS to prepend to. Currently, the following ASes are supported: 1668, 209, 2914, 3300, 3356, 3549, 3561, 4635, 6447, 701, 7018, and 702. Example: AS 123 is a customer of Sprint. They are currently announcing 10.0.0.0/8 to Sprint. The current AS-Path is “1239 123”. AS 123 then tags this advertisement with the following communities: 65000:124, 65002:456, 65003:789, and 65004:1011. This will have the following effects: Sprint will not announce this route (10.0.0.0/8) learned from AS 123 to AS124. Sprint will announce this route (10.0.0.0/8) learned from AS 123 to AS456 with the AS-PATH “1239 1239 123”. Sprint will announce this route (10.0.0.0/8) learned from AS 123 to AS789 with the AS-PATH “1239 1239 1239 123”. Sprint will announce this route (10.0.0.0/8) learned from AS 123 to AS1011 wi
