Path: utzoo!attcan!uunet!mailrus!ncar!boulder!daemon
From: satz@cisco.com (Greg Satz)
Newsgroups: comp.dcom.sys.cisco
Subject: Re: Questions about Appletalk routing
Message-ID: <22094@boulder.Colorado.EDU>
Date: 11 Jun 90 08:50:28 GMT
Sender: news@boulder.Colorado.EDU
Lines: 30

>> o Is is sufficient to ensure that my gateway Mac's are running Ethertalk V1.0
>>   and everything will play together without a hitch?  [He asks, hopefully :-)]

You need the Phase I EtherTalk driver (single set of arrows when viewed
from the Chooser). The Internet Router needs the Phase 2 Upgrade Utility
which is an Init that helps the router software speak Phase I.

>> o Has anyone 'out there' used the Apple Internet Router software in
>>   conjunction with cisco's routing Ethertalk?  Are there any caveats
>>   that we should be aware of?

I use the Apple Internet Router every day and it works just fine. You want
to use the latest 8.0 or 8.1 software in your routers.

>> o Is Ethertalk addressing so radically different from Localtalk?  Part of
>>   my confusion arises from my impression that Appletalk V1 uses 8-bit
>>   addressing and Appletalk V2 uses 24-bit addressing...  but cisco's
>>   documentation says that they deal with 24-bit Appletalk addresses
>>   and yet only support Appletalk V1.  Huh?

AppleTalk, the protocol -- both phases, uses a 24 bit address. 16 for
network and 8 for node. EtherTalk and TokenTalk use 48 bit MAC level node
addresses.  LocalTalk uses an 8 bit node address which happens to nicely
correspond with the AppleTalk node address. LocalTalk media doesn't require
an address resolution function. You are confusing the AppleTalk network
layer protocol addresses versus the AppleTalk link layer protocol
addresses.

Greg Satz
cisco