Steve Heimlich (heimlich@ans.net) on November 14:
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Some sort of scalable, easily maintainable advisory mechanism would be cool to have, but I haven't really thought about it too much. I'm certain that a tool could be written to do a search over the graph of ASes defined in all the registries, but we'd need to make sure that the registered information accurately reflected global AS topology. Using this tool once a day (or however often), you could get a view of the paths to any AS from your own point of view (e.g., from 3561 or 690 to anywhere). Almost like an administrative version of IDPR I suppose. The backend of that thing could munge your aut-num (or provide a nice list of suggestions).
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Steve, Currently under development here at ISI is a tool that we call a what-if database. It will enable one to change policies temporarily (i.e. without actually registering in any database) and do analysis. For example, you can change your as-in policies to ANY and use prpath to find paths or prconn (currently being developed) to find all the reachable destinations. The tools, when interacting with the what-if database, may give you the delta of the changes. Hence, the result of prconn may be the new address/prefixes that are now reachable and were not before and vice versa. Of course, for this tool to be useful, radb needs to be cleaned up of bogus aut-num objects, and decent aut-num objects need to be maintained by all (well most:-). Do you think something like this covers what you want? Cengiz -- Cengiz Alaettinoglu Information Sciences Institute (310) 822-1511 University of Southern California http://www.isi.edu/div7/people/cengiz