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From: winders@aux.support.apple.com (Scott Winders)
Newsgroups: comp.protocols.appletalk
Subject: Re: Appletalk Phase 1 - 2 Question.
Message-ID: <48777@apple.Apple.COM>
Date: 2 Feb 91 02:37:47 GMT
References: <11941@goofy.Apple.COM>
Sender: nntp@Apple.COM
Organization: Apple Computer, Inc.
Lines: 53

In article <11941@goofy.Apple.COM> Tkaczuk.apple.com (Rick Donnelly) 
writes:

> The Upgrade Utility is an INIT that is installed on a Phase II router 
that 
> is directly connected to the Phase 1 (node or router).  The utility 
> converts the Phase I packets (with non-extended network addressing) to 
> Phase II packets (with extended addressing so that the packets can be 
> routed).  The utility is, however, a stopgap measure. The phase 1 nodes 
> will not be able to find any network that has been assigned a range of 
> packets (the extended network information cannot be passed in a Phase 1 
> packet) and will only be able to see localtalk networks or those 
> Ether/Token networks that do not have a network range.
> 
> Rick

Rick,

The information you have posted is incorrect.  Here is the correct 
information:

The AppleTalk Phase 2 Upgrade Utility: What it is and what it does

There has been a lot of confusing information circulating about what the
AppleTalk Phase 2 Upgrade Utility is and what it does.  The intent of this
article is to clarify this situation.

The AppleTalk Phase 2 Upgrade Utility makes it possible for AppleTalk 
Phase 1 routers to operate concurrently in an internet with the AppleTalk Internet Router. The AppleTalk Phase 2 Upgrade Utility is an INIT that is installed in the System Folder of the Macintosh running the AppleTalk Internet Router software.

Why is the the AppleTalk Phase 2 Upgrade Utility necessary?  The AppleTalk
Internet Router sends out AppleTalk Phase 2 style Routing Table Maintenance
Protocol (RTMP), Name Binding Protocol (NBP), and Zone Information Protocol
(ZIP) packets.  AppleTalk Phase 1 routers are not able to interpret the 
data within these packets.

With the AppleTalk Phase 2 Upgrade Utility installed, any RTMP, NBP, or ZIP
packet that is about to be sent out over a cable that has an AppleTalk 
Phase 1 router on it, will be sent as an AppleTalk Phase 2 style packet and will be converted by the AppleTalk Phase 2 Upgrade Utility and sent out as an 
AppleTalk Phase 1 style packet as well. Note: Only RTMP, NBP, and ZIP packets are converted to AppleTalk Phase 1 style packets.  No other packets types need 
to be converted; their formats have not changed.

The AppleTalk Phase 2 Upgrade Utility also makes it possible for the 
AppleTalk Internet Router to receive AppleTalk Phase 1 style RTMP, NBP, and ZIP packets.  When the AppleTalk Phase 2 Upgrade Utility INIT installs, it flips a  switch in the AppleTalk Internet Router that allows the router to accept and process AppleTalk Phase 1 style RTMP, NBP, and ZIP packets.  The AppleTalk Phase 2 Upgrade Utility does not convert these packets.  The AppleTalk Internet Router has code built into it that allows it interpret these packets properly.

What does the AppleTalk Phase 2 Upgrade Utility not do?  It does not 
convert all outgoing AppleTalk Phase 2 packets to AppleTalk Phase 1 packets.  This is not necessary, only RTMP, NBP, and ZIP packets need to be converted.  The AppleTalk Phase 2 Upgrade Utility does not work with any third-party router; it only works with the AppleTalk Internet Router.

I hope this information clears up any remaining confusion...

Scott Winders
internet: winders@aux.support.apple.com
AppleLink: winders.s@applelink.apple.com