[HECnet] Multics online as node 1.770 (BANAI)

[Keith Halewood]

We used to run DECnet over X.25 1984 (Ethernet) circuits at the time when our academic network ‘authorities’ thought they could persuade the rest of the world to ditch IP and go ISO.

The bigger vaxes had x.25 synchronous cards in them.

Keith

On 7 Sep 2018, at 10:23, Dave Wade <dave.g4ugm at gmail.com> wrote:

>> -----Original Message-----
>> From: owner-hecnet at Update.UU.SE <owner-hecnet at Update.UU.SE> On
>> Behalf Of Paul Koning
>> Sent: 07 September 2018 18:00
>> To: hecnet at Update.UU.SE
>> Cc: jhj at reagan.com
>> Subject: Re: [HECnet] Multics online as node 1.770 (BANAI)
>> 
>> 
>> 
>>> On Sep 6, 2018, at 7:47 PM, Jeffrey H. Johnson <jhj at trnsz.com> wrote:
>>> 
>>> ...
>>> Other things being worked and in various stages of completion are X.25
>> networking and IBM 3270 terminal support. If we can complete the X.25
>> support, I envision creating a 'BAN X.25 PSDN', a virtual hobbyist
>> Telenet/Tymnet-like PSN network for X.25 systems. There are other exciting
>> Multics projects in progress by other parties as well.
>> 
>> X.25 is basically a datalink layer (HDLC with some tweaks).  What would
> such a
>> virtual network look like?  I figure something like tunneling X.25
> semantics
>> over TCP, or something along those lines.  Or sending approximate X.25
> PDUs
>> over UDP, the way the SIMH DDCMP implementation does for that data link.
> 
> Isn't X.25 is a network layer. Virtual Circuits span multiple HDLC links.
> Not sure if RFC1086 or RFC11356 are still relevant.
> 
>> 
>> If you get this working, it would maybe open up the possibility of
> reviving the
>> DECnet over X.25 machinery.  :-)
>> 
>>    paul
> 
> Dave
>