Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!giza.cis.ohio-state.edu!bob
From: bob@giza.cis.ohio-state.edu (Bob Sutterfield)
Newsgroups: comp.protocols.tcp-ip
Subject: Re: DecNet on TR
Message-ID: 
Date: 13 Aug 89 17:44:18 GMT
References: <8908100159.AA18417@ucbvax.Berk?ley.EDU>
Sender: news@tut.cis.ohio-state.edu
Reply-To: Bob Sutterfield 
Organization: The Ohio State University Dept of Computer & Information Science
Lines: 22
In-reply-to: cire@CISCO.COM's message of 10 Aug 89 00:27:20 GMT

In article <8908100159.AA18417@ucbvax.Berk?ley.EDU> cire@CISCO.COM (cire|eric) writes:
   As far as I know the only media that DecNet currently runs over is
   serial lines and ethernet.

In days of yore DECnet's only medium was a parallel interface like the
Unibus DR11-W.  Ethernet was a major step forward at the time, and its
advent was the cause of much rejoicing.  It probably still runs on
parallel interfaces.  Also, you might consider the fiber links to the
DEC mass storage server (sorry, I've forgotten the name/number) to be
a token ring, and I believe they can be a host's only connections to
the rest of a DECnet.

   Are there other media that DecNet is being implemented on?  In
   particular are there other implementations of DecNet on Token Ring?

Proteon's networks can pass DECnet, much as they can pass IP and XNS.
OSU has some PROnet-80 routers configured for DECnet service, though
throughput suffers markedly if DECnet shuffling is enabled.  It's
something about DECnet relying on {broad,multi}cast and that absorbing
too much juice from the router's CPU.  I don't recall the details; we
were just happy when the DECnet folks got their own router and freed
up our box for just IP and XNS.