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Path: utzoo!mnetor!seismo!ut-sally!husc6!sri-unix!teknowledge-vaxc!mkhaw
From: mkhaw@teknowledge-vaxc.ARPA (Michael Khaw)
Newsgroups: comp.protocols.tcp-ip,comp.sys.dec,comp.unix.questions,comp.os.vms,comp.sys.misc
Subject: Re: TCP/IP ETHERNET DECNET VAX
Message-ID: <13188@teknowledge-vaxc.ARPA>
Date: Fri, 29-May-87 14:23:08 EDT
Article-I.D.: teknowle.13188
Posted: Fri May 29 14:23:08 1987
Date-Received: Sun, 31-May-87 08:37:57 EDT
References: <2033@a.cs.okstate.edu>
Reply-To: mkhaw@teknowledge-vaxc.UUCP (Michael Khaw)
Organization: Teknowledge, Inc., Palo Alto CA
Lines: 33
Keywords: TCP/IP ETHERNET DECNET VAX
Xref: mnetor comp.protocols.tcp-ip:299 comp.sys.dec:215 comp.unix.questions:2591 comp.os.vms:636 comp.sys.misc:612

In article <2033@a.cs.okstate.edu> keith@a.cs.okstate.edu (Keith Lovelace) writes:
...
>Problem one.  Can ULTRIX, or 4.2 BSD (since it is supposedly not changed by
>DEC) support both a DECNet link and a TCP/IP link at the same time without
>problems?
>
>Problem two.  Does ULTRIX do very well talking to terminal servers such as
>the ANNEX UX on TCP/IP?
>

We run both tcp/ip and decnet on our Ultrix machines, each of which has a
single DEC ethernet interface (DEUNA, DEQNA, DELUA, as appropriate).  We
also have many terminals that connect via tcp/ip terminal servers (Cisco
Systems "TIP"s).

I don't know what you mean by "do very well".  People on terminal servers
get marginally more sluggish response, because of the tcp/ip packet overhead,
than people on direct lines to the vax, but it is quite tolerable.

Anyone accustomed to VMS decnet will find the Ultrix decnet rather impoverished.
Ultrix decnet file transfer is rather inconvenient compared to either ftp or
VMS to VMS decnet file transfer.  Decnet remote logins from VMS to Ultrix
are also awkward because of the VMS terminal driver attempts to handle control
character interpretation (you can turn most of it off, but the point is that
decnet doesn't do that automatically for you), and line-oriented (instead of
character-oriented) i/o.  We run tcp/ip on our VMS machines and use it in
preference to Decnet.

Mike Khaw
-- 
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