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I have defined 3 AS (1000 <---> 2000 <---> 3000). Every AS has one router with 2 fa interfaces and one loopback. After starting bgp on all interfaces and announcing networks with commands: router bgp 1000 and network mask (and the same for other ASs). I see all announced networks when I type show ip bgp on all hosts. I can ping both loopbacks from router in AS 2000, but I can't ping loopback in AS 1000 from router in AS 3000.

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What are you failing to understand? –  womble Mar 4 '12 at 5:45
What does show ip route display when you run that on the router in AS 3000, where is the IP address of the loop back on the router in AS 1000? –  jwbensley Sep 5 '12 at 21:11
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