There's two kinds of traffic that Alternet can provide to SmallGuy:
[ a) deleted...standard peering ]
b) transit peering, meaning Alternet announces to SmallGuy all routes that SmallGuy is paying to get (Alternet's plus everyone else's presumably, though transit-to-some-but-not-al ASes can also be done, and where Alternet propagates all of SmallGuys route announcements to the ASes SmallGuy buys access to.
[Buying access to some ASes but not the whole Internet as seen by Alternet can be hard since some of these ASes may not be directly connected to Alternet, in which case SmallGuy must also pay for transit to the ASes between Alternet and the ones he desires. In practice SmallGuy will buy transit to the whole Internet as heard of by Alternet.]
Unfortunately, this is not particular feasible in any great amount (at least on a Cisco). The differnet filter-lists needed for each peering session would make your configuration downright un-wieldy after a few such arrangements. I starting having to deal with three filter-lists to update on the mae-east net99 router for one similar project, and each time I added a new peer, all three of them had to be updated a little differently. Had it gotten any worse, I would have had to build some script to automatically update my filter-lists for me. Even if it was easy, I really wouldn't want to wade through the configuration file when done. They are getting bad enough already. Dave -- Dave Siegel President, RTD Systems & Networking, Inc. (520)318-0696 Systems Consultant -- Unix, LANs, WANs, Cisco dsiegel@rtd.com User Tracking & Acctg -- "Written by an ISP, http://www.rtd.com/ for an ISP."