Path: utzoo!attcan!uunet!seismo!sundc!pitstop!texsun!sun-barr!rutgers!apple!bloom-beacon!tut.cis.ohio-state.edu!ucbvax!hplabs!hpda!hpcuhb!hpindda!kmont
From: kmont@hpindda.HP.COM (Kevin Montgomery)
Newsgroups: comp.protocols.iso
Subject: Re: OSI IP routing on the DDN?
Message-ID: <5560018@hpindda.HP.COM>
Date: 27 Apr 89 04:18:44 GMT
References: <8904212105.AA13006@lance.tis.llnl.gov>
Organization: HP Information Networks, Cupertino, CA
Lines: 19

/ hpindda:comp.protocols.iso / genovese@LANCE.TIS.LLNL.GOV (Tony Genovese) /  3:05 pm  Apr 21, 1989 /

> development of prototype OSI IP routers. These routers
> would allow the coexistence of OSI and DOD IP packets.

also, would someone explain the parsing?  Do ISO IP
packets have protocol IDs larger than 64 to avoid
colliding with ARPA IP packets?  (ISO IP has the
protocol ID in the first octet, whereas ARPA IP
uses the first nybble- if ISO IP had a protocol ID
field less than 64, it would look like an old version
ARPA IP packet with confused length and checksums).
Are the checksums and length fields parsed in a "i'll
try to parse it ARPA and see if it works" strategy?

				kevin

BTW- this was just the topic of one of my questions on
a final I just turned in yesterday, so I'm interested!