[HECnet] Attaching to hecnet

[H Vlems]

Johnny, the original DECnet manuals showed pictures of area routers that
were interconnected by WAN links. Each site had its own area number. In fact
the name "area routing" implies clearly that the concept was meant to set up
DECnet networks that were geographically separated.
I ran a fairly large DECnet environment 20 years ago with >20 PDP-11's, >80
VAX systems >600 pc's and several alpha's, plus a few unix systems that ran
DECnet too (in those days DECnet was the multiplatform protocol of choice).
I seprataed each factory in its own DECnet area. DEC Holland got midly
interested in the design because they wondered whether the level 2 routing
overhead wouldn't hurt network performance. Which it didn't :-)
One reason for separating systems in different areas was that rebooting the
pc's would generate so many DECnet state up and down messages that PDP-11's
and the older VAX systems choked in their console output.

Hans

-----Oorspronkelijk bericht-----
Van: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] Namens
Johnny Billquist
Verzonden: maandag, juni 2010 21:11
Aan: hecnet at Update.UU.SE
Onderwerp: Re: [HECnet] Attaching to hecnet

Brian Hechinger wrote:
Ok, so I should be getting to my plans soon enough here and had some
questions
about how I should set this up.

I'm going to install SIMH on the machine in colo (100mbit connection here
in
the US, so might be useful as a "hub") as well as a small handful of boxes
here at home.

Sounds good.

Should I just use one area?   What's the best way to set that up?

Areas in DECnet are not really meant to be associated with physical 
location, but rather with organizational. So keep it within one area.

For physically different locations, you might want to use level 1 
routers, though. But as the internet nowadays is so fast, using just a 
bridge, and pretend that it's all one ethernet segment also works just fine.

	Johnny

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