Path: utzoo!utgpu!news-server.csri.toronto.edu!clyde.concordia.ca!mcgill-vision!snorkelwacker!bloom-beacon!eru!luth!sunic!mcsun!ukc!icdoc!qmw-cs!liam
From: liam@cs.qmw.ac.uk (William Roberts)
Newsgroups: comp.protocols.appletalk
Subject: Re: phase 2 with CAP/KIP
Message-ID: <2627@sequent.cs.qmw.ac.uk>
Date: 9 Aug 90 11:39:16 GMT
References: <2687293@AppleLink.Apple.COM>
Organization: Computer Science Dept, QMW, University of London, UK.
Lines: 31

In <2687293@AppleLink.Apple.COM> CLAUSS1@applelink.apple.com (Clauss, Chris) writes:

>    KIP and CAP are still AppleTalk Phase 1!  This is not a problem if we have
>some router (FastPath, GatorBox, AppleTalk InterNet Router, etc.) that is
>acting as a Phase 1 to Phase 2 "transition router".  But it seems to me that
>one of the weakest parts of the KIP and CAP setup is that it is still Phase 1.
>I hope that one of you CAP geniuses will be able to make CAP into a Phase 2
>product.  Apple will now sell the source for a UNIX-based, polished CAP-like
>package for $40,000 + $500/yr but that is a bit much!  What we need is a
>version of CAP which is ready for the 90's.  Anybody trying to do this???

Sorry Chris, but you don't know what you are talking about. The KIP stuff
is about shipping DDP packets around on IP networks, encapsulated in UDP
datagrams. The Phase1/Phase2 issues are mostly below this level, though
it does affect the Zone Information Protocol.

The translation between KIP and LocalTalk (still Phase1 we note, no sense in
upsetting those LaserWriter owners...) or EtherTalk is done in a machine
such as a FastPath: this could be the KIP code but the Phase2 changes to
a router are distinctly non-trivial.

You were wrong about the FDDI complaint as well: the Phase2 stuff doesn't
get modified by Ethernet/FDDI bridges. The complaint is that Apple goofed
badly in chosing the format for the AARP such that it won't travel well
in bridged Ethernet/FDDI environments.
-- 

William Roberts                 ARPA: liam@cs.qmw.ac.uk
Queen Mary & Westfield College  UUCP: liam@qmw-cs.UUCP
Mile End Road                   AppleLink: UK0087
LONDON, E1 4NS, UK              Tel:  071-975 5250 (Fax: 081-980 6533)