AS690 advisory update

Steve Heimlich heimlich at
Wed Nov 15 19:11:49 UTC 1995

Yep, sounds useful (for starters).

How about a tool to clean up the RADB?  :-)


> Steve Heimlich (heimlich at on November 14:
> > <ramble begins>
> > 
> > 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).
> > 
> > <ramble ends>
> 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

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