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- Path: sparky!uunet!caen!sol.ctr.columbia.edu!usc!lkimes
- From: lkimes@alshain.usc.edu (Lance 'Moof' Kimes)
- Newsgroups: comp.protocols.appletalk
- Subject: Re: multiple phase2 zones on a network
- Date: 10 Nov 1992 11:31:14 -0800
- Organization: University of Southern California, Los Angeles, CA
- Lines: 30
- Distribution: world
- Message-ID: <1dp2m2INNhna@alshain.usc.edu>
- References: <9211091328.AA24235@te6000.otc.lsu.edu> <10NOV199211222486@comb1.comb.umd.edu>
- NNTP-Posting-Host: alshain.usc.edu
-
-
- The is confusion around about how this works. Through reading, experience, and
- mistakes, I have come to an understanding of AppleTalk. So here goes:
-
- Every network range has a zone list that contains 1 or more zones.
- This zones are completely "inclusive" to the net range. Zone names don't "span"
- across networks per se.
-
- Every router or gateway on network maintains a zone information table that
- lists all zone names and their network ranges including networks that
- "share" the same zone name(s).
-
- What this means is that when a user does an NBPLookup of LaserWriter in "Zone"
- "Ethernet", all networks that contain that zone in their lists will pass that
- lookup through so that nodes can answer back if their in that zone.
-
- This gives zone names the appearance of "spanning" across network ranges.
-
- Also, zone lists are never discarded or updated unless their network(s) are
- completely removed from routing tables. Its a once and once only configuration
- for the duration of a networks "uptime".
-
- A special note to the guys using novell:
- I once setup all the routers with a new zone list and then brought the network
- back up. Well, it should have worked except that it didn't occur to me that
- the novell 3.11 servers would seed the network with the old zone list they had.
- If you have novell 3.11 servers, you must coordinate them with any other routers
- you have in order to change the network zone list.
-
- Lance Kimes
-