Date: Mon, 25 Oct 93 04:30:01 PDT
From: Advanced Amateur Radio Networking Group <tcp-group@ucsd.edu>
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Subject: TCP-Group Digest V93 #277
To: tcp-group-digest
TCP-Group Digest Mon, 25 Oct 93 Volume 93 : Issue 277
Today's Topics:
Kind of interesting problem.
TCP-Group Digest V93 #274 (2 msgs)
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Date: Sun, 24 Oct 1993 00:24:38 -0400
From: goldstein@carafe.tay2.dec.com (k1io, FN42jk)
Subject: Kind of interesting problem.
To: tcp-group@ucsd.edu
Isn't this packet (ARP _from_ broadcast, causing broadcast storm) known
in the trade as a "Chernobyl Packet"?
fred
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Date: Sun, 24 Oct 93 13:21:04 GMT
From: Jonathan Naylor <g4klx@g4klx.demon.co.uk>
Subject: TCP-Group Digest V93 #274
To: TCP-Group@ucsd.edu
> Date: Thu, 21 Oct 93 8:43:02 PDT
> From: bmeyer@netcom.com (R. W. Meyer)
> Subject: Network Standards
> To: TCP-Group@ucsd.edu
>
> The statement was made here a couple days ago that NET/ROM was no longer
> being marketed. As a point of order thats not entirely true. I checked
> with WA8DED (one of NET/ROMs oringinal authors) and it is still being
> produced and marketed by a company called Amatech International (no I never
> heard of them before either). I called and got one of their brochures.
> They can be reached at:
>
When I bought two NET/ROMs in late 1987 I had to send off to Amatech
International. About a month later TheNet 1.0 turned up, oh well. Would WA8DED
mind if the NET/ROM protocol was documented and made publically accessible ?
The protocols are fully described in the back of the manual (which is what
G8BPQ used for his implementation). I would be quite happy to do an ASCII text
version of the protocols complete with 'extensions' and some examples IF I knew
that it would not be infringing any copyrights.
>
Unfortunately almost all of the discussion about NET/ROM has centred around the
implementation rather than the protocol itself. The NET/ROM manual splits the
Network and Transport 'Headers' and describes them seperately. My main
objections to NET/ROM are the lack of an ICMP type functionality, the lack of a
Transport Protocol ID so that IP, TCP and NET/ROM Transport could be
multiplexed over it much easier. Because NET/ROM uses callsigns for its Node
IDs makes subnetting and the use of masks for routing impossible. The fact that
NET/ROM does not have an ARP level doesn't worry me, I may be old fashioned but
we are talking about protocols that are to be used over amateur radio, not
Ethernet or land-lines, and I feel that the use of callsigns in the Link Layer
is a Good Thing (tm). FYI G8BPQ has NET/ROM running over ethernet.
>From the amateur radio viewpoint IP and TCP are not above criticism. There are
a lot of bytes (sorry octets) in them that are essentially unused most of the
time. By default amateur TCP/IP doesn't use VJ header compression or something
similar which I feel could be a big win on standard 1200 Baud user access
frequencies.
Jonathan
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Date: Sun, 24 Oct 1993 14:31:06 -0400
From: "Louis A. Mamakos" <louie@uunet.uu.net>
Subject: TCP-Group Digest V93 #274
To: g4klx@g4klx.demon.co.uk
> From the amateur radio viewpoint IP and TCP are not above criticism. There are
> a lot of bytes (sorry octets) in them that are essentially unused most of the
> time. By default amateur TCP/IP doesn't use VJ header compression or something
> similar which I feel could be a big win on standard 1200 Baud user access
> frequencies.
VJ header compress presumes a fairly reliable link-level protocol with
minimal loss. This surely isn't met on most 1200 bps user channels,
unless you layer it over an AX.25 VC.
Louis A. Mamakos, WA3YMH louie@uunet.uu.net
UUNET Technologies, Inc. uunet!louie
3110 Fairview Park Dr., Suite 570 Voice) +1 703 204 8000
Falls Church, Va 22042 Fax) +1 703 204 8001
------------------------------
Date: Mon, 25 Oct 1993 03:51:23 -0700
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End of TCP-Group Digest V93 #277
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