I this 'trick' you're looking for is that of disabling BGP synchronization (i.e., 'no synchronization' in IOS parlance). Putting external things in your IGP is a really BAD idea, BTW. -danny

What is the preferred way to get transit customers routing information into your IGP so that BGP will announce the route to it's neighbors.

1===2a===2b====3 | 4

1 is the customer, announcing to 2a, who propogates 1's route to 2b and to 4. 2b will not announce the route to 3 as it doesn't have a route in it's routing table for 1's route. I was thinking about redistributing bgp into my igp using a route-map based on as-path filter, but that seems somewhat kludgy. What are you all doing to accomplish this or am I just missing something here?