Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!unmvax!pprg.unm.edu!hc!ames!amdahl!pyramid!prls!philabs!ttidca!alter From: alter@ttidca.TTI.COM (Steve Alter) Newsgroups: comp.mail.uucp Subject: Re: map wizardry - terminal links Message-ID: <3528@ttidca.TTI.COM> Date: 8 Dec 88 21:32:37 GMT References: <571@comdesign.CDI.COM> <810@mailrus.cc.umich.edu> <513@ditka.UUCP> <4109@mailgw.cc.umich.edu> Organization: Citicorp/TTI, Santa Monica Lines: 58 In article <4109@mailgw.cc.umich.edu> emv@mailgw.cc.umich.edu (Ed Vielmetti) writes: } Try this: } } formtek sunpitt(DEMAND) } sunpitt(DEMAND+HOURLY),sun(DEAD) } } in your paths.local file. That should have the same impact as your } proposed syntax. I was planning to post the same suggestion, but saw a problem in it. I mailed Karl Swartz a different suggestion; I didn't post it as I wasn't sure about its validity. Currently, there is no map-entry for sunpitt at my site; it sounds like Sun Microsystems at Pittsburg but does not appear in any of the Pennsylvania files. A couple of sites talk to sunpitt, but sunpitt doesn't talk to anybody? AS LONG AS THIS IS TRUE, the above suggestion will work, but if sunpitt decides to submit a map-entry... (read on.) The following is based, hypothetically, on the assumption that sunpitt submits a map-entry with this cost in it: sunpitt sun(HOURLY) The problem with the above suggestion (please correct me if I'm wrong!) is that pathalias would see two unrestricted costs for the sunpitt!sun link and will use the cheaper one in building the routing tables. The following line: sunpitt (DEMAND+HOURLY) only means that the specified cost can enter the competition for routes from formtek TO sun, but that link becomes very costly for routes THROUGH sun to points beyond. Now, we still have two unrestricted costs for the same link: sunpitt sun(HOURLY) ! sunpitt's entry sunpitt sun(DEAD) ! formtek's paths.local Pathalias will use the cheaper one and will probably still end up generating some routes through sunpitt!sun to other sites. What is missing is the ability for formtek's paths.local to OVERRIDE other costs for the same links, i.e. if the sunpitt sun(DEAD) can override the sunpitt sun(HOURLY) then no routes through that link to other sites will be generated, but that link will still be used for mail directly to sun, because of the sunpitt (DEMAND+HOURLY) ! what a wierd cost! line. This make sense to anyone? -- Steve Alter {csun,philabs,psivax,pyramid,quad1,rdlvax,retix}!ttidca!alter Citicorp/TTI, Santa Monica CA (213) 452-9191 x2541