[HECnet] DECnet/Python

[Johnny Billquist]

X.25 was available for many DECnets, but it seem DEC usually sold it as 
a separate addon. While I have all parts of DECnet for RSX, I do not 
have the X.25 stuff. It was on a separate distribution, compared to the 
rest of the pieces, it seems.

   Johnny

On 2021-10-28 02:13, Thomas DeBellis wrote:
> Remind me what "PCL" transport is, please?
> 
> Tops-20 seems to have had DECnet over X.25 at some point, but I don't 
> see any of source for that in the PANDA distribution.  It is possible 
> that it may be on a standard DEC distribution tape on trailing-edge.
> 
> /Maybe/
> 
> In certain cases, DEC would not release source, even if you paid to be a 
> source site.  So you can't get TGHA (bummer) nor the NICE process 
> (double bummer).
> 
> On 10/27/21 9:52 AM, Paul Koning wrote:
>>> On Oct 27, 2021, at 9:20 AM, Johnny Billquist<bqt at softjar.se>  wrote:
>>>
>>> To answer Brian in one way - I usually try to organize so that people get hooked up to someone physically close to them, who are sortof local HECnet access points. There are a bunch of people I have on my list that I tend to make use of for this, but it is otherwise pretty flexible.
>>>
>>> But it don't make sense to have the link going to someone far away. That just means silly roundtrips if you then talk to someone nearby, while for connections far away, it's going to make that jump anyway, no matter where you connect.
>>>
>>> And a few questions/comments on what Paul wrote:
>>>
>>> On 2021-10-27 15:06, Paul Koning wrote:
>>>> A couple of considerations:
>>>> 1. Is there a backbone router in your area?  If yes, you'd want to connect there.
>>> With area I assume you mean physical area here, and not DECnet area.
>> Oops.  Yes.  But everywhere else I meant DECnet area, and should said so clearly.
>>
>>> ...
>>> For the others, Paul pretty much summed it up. In addition, it should probably be mentioned that Multinet over TCP or UDP is possible inside VMS and RSX (as well as with PyDECnet). DDCMP over TCP or UDP is possible with PyDECnet (actually, I could probably add that in RSX as well), while GRE is mainly for Cisco, but I think PyDECnet also can do that one?
>>>
>>> So choices are somewhat dependent on what system/software you are using.
>> Yes, PyDECnet supports: real Ethernet, Ethernet bridging over UDP, GRE, Multinet over TCP (and UDP but don't), DDCMP over TCP, UDP, simulated async connections including Telnet, real async connections, and sync connections via my DDCMP framer device.  In other words, most of the datalinks DECnet has ever supported.  Missing are 802.5 token ring, HDLC, X.25, and PCL, I think that's about it.  Some day I'll think about 802.5 support not so much for that but because it would enable DECnet over WiFi.
>>
>> 	paul
>>

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol