Path: utzoo!utgpu!watserv1!watmath!att!pacbell.com!ucsd!sdd.hp.com!usc!apple!Tkaczuk.apple.com
From: Tkaczuk.apple.com (Rick Donnelly)
Newsgroups: comp.protocols.appletalk
Subject: Re: Appletalk Phase 1 - 2 Question.
Message-ID: <11914@goofy.Apple.COM>
Date: 30 Jan 91 16:40:24 GMT
References: <9101291116.aa27259@COR2.PICA.ARMY.MIL>
Sender: usenet@Apple.COM
Lines: 16

Phase II does not need a hardware upgrade of any kind.  The biggest 
difference the user sees between Phase I and Phase II networks is that 
Phase 1 routers allow only 1 network per network number to a max of 253? 
zones.  In a Phase 2 network (I'm quoting from the Internet Router course 
material here), "each network number is a network address that can be 
associated with up to 253 nodes. The size of the network range (note: max 
range of 1-65279) determines the maximum number of AppleTalk devices on 
the physical network.  A network having the range 1-10 could contain up to 
10x253 (2530) nodes."
Thus, Phase 2 nets can be larger and partitioned more logically.  Phase 1 
routers cannot be used on Phase 2 nets and must be run with an "Upgrade 
Utility" so that they can communicate with Phase 2 routers.  Users of the 
net will notice no difference in performance or behavior, but network 
managers will definitely see some changes.
Hope this answers your questions.
Rick Donnelly