Path: utzoo!utgpu!water!watmath!clyde!bellcore!faline!thumper!ulysses!andante!mit-eddie!ll-xn!ames!lll-tis!mcb From: mcb@lll-tis.UUCP Newsgroups: news.admin,comp.mail.uucp Subject: Re: Internet Paths in UUCP Maps -- Can We Stop? Summary: Response to "Second try" Message-ID: <22248@tis.llnl.gov> Date: 3 Jun 88 00:03:01 GMT References: <25550@pyramid.pyramid.com> <300@ncar.ucar.edu> <9512@e.ms.uky.edu><25756@pyramid.pyramid.com> Reply-To: mcb@tis.llnl.gov (Michael C. Berch) Organization: Lawrence Livermore National Laboratory, Livermore CA Lines: 33 Posted: Thu Jun 2 20:03:01 1988 Xref: utzoo news.admin:2420 comp.mail.uucp:1337 Path: utzoo!utgpu!water!watmath!clyde!bellcore!faline!thumper!ulysses!andante!mit-eddie!ll-xn!ames!lll-tis!mcb From: mcb@lll-tis.UUCP Newsgroups: news.admin,comp.mail.uucp Subject: Re: Internet Paths in UUCP Maps -- Can We Stop? Summary: Response to "Second try" Message-ID: <22248@tis.llnl.gov> Date: 3 Jun 88 00:03:01 GMT References: <25550@pyramid.pyramid.com> <300@ncar.ucar.edu> <9512@e.ms.uky.edu> <25756@pyramid.pyramid.com> Reply-To: mcb@tis.llnl.gov (Michael C. Berch) Organization: Lawrence Livermore National Laboratory, Livermore CA Lines: 33 I'm beginning to get a glimmer of what Carl means in the "Second try", but I still don't think I agree with the underlying assumptions. Assuming that everyone is being honest (or at least rational) about the pathalias cost of their links, both UUCP and Internet, then we must assume that in the absence of pathological behavior the least cost (i.e., "most efficient") routes are chosen. One problem is that the pathalias constants (at the lower numeric levels; you don't see too many "WEEKLY" entries any more) are stated as "grade of connection" ("DIRECT", "DEDICATED") but people attempt to derive cost and speed of delivery from them. In many cases multiple hop SMTP service is *much* quicker than single-hop UUCP service, and for people whose network costs are not (yet) usage-sensitive (hint, hint), it is cheaper as well. We only list internet connections in the map entry when we have a TCP-UUCP connection with the site as well, so that mail to !foo!bar will succeed if we have a TCP-UUCP connection to foo.gov, but bar@foo will fail since foo is not in our local domain; !foo.gov!bar is handled by the sendmail config and will succeed in any case. Michael C. Berch mcb@tis.llnl.gov / {ames,ihnp4,lll-crg,lll-lcc,mordor}!lll-tis!mcb