Well I did a bit of digging at the sudden difference we are seeing. A lot of this points to different levels of aggregation at different points in the Internet. I took a dump from Bill's box at ?LA? and from the xara.net router I use at Mae-east and saw one immediate example of this. Here's the prefixes announced out of the 206.16/16 (belongs to CERFNET) block.

*sigh* The as6332 (after a bit of digging) belongs to a customer of ours. I was unaware that they were announcing any routes out alternate paths, or using an AS to do it (they do not bgp peer with us). I'll have to talk to them tomorrow. As for Bill's router sandbox, he said he wanted ALL routes, not just our routes, so I hadn't put any filters/aggregation in place for his peer. I've removed the peer for now until I can "fix" it and send out just the aggregates. Bill, I should have it up tomorrow afternoon, too tired to work on it now... -meg meg@cerf.net