[HECnet] Decnet on RSX-11

Kurt Hamm kurt at hamm.me
Sat Jun 8 18:08:06 PDT 2019


OK.  I did have two ethernet adapters configured for each server.  I
disabled the second one.  But, worse, in the simh ini file, both servers
had the same MAC addresses associated with their ethernet adapters.  I am
not sure how this ever worked.

I am still checking things and will start working on that PDP-11 default
thing shortly.

Kurt



On Sat, Jun 8, 2019 at 8:47 PM Johnny Billquist <bqt at softjar.se> wrote:

> Oh, and by the way... Do you have two physical, separate ethernets?
> Because otherwise you might be in even more trouble, as you have two
> ethernet interfaces defined on MOE, and they both see LARRY. If you
> actually have two ethernet networks between the two machines, then
> everything is fine. Otherwise you are actually very messed up.
>
>    Johnny
>
> On 2019-06-09 02:45, Johnny Billquist wrote:
> > Maybe not much comfort, but MOE isn't using the multinet link to LARRY
> > either, but is also talking over ethernet.
> >
> >    Johnny
> >
> > On 2019-06-09 02:36, Kurt Hamm wrote:
> >> Ugh.  Back to work.
> >>
> >> I did see some errors....
> >>
> >> Kurt
> >>
> >> On Sat, Jun 8, 2019, 8:35 PM Johnny Billquist <bqt at softjar.se
> >> <mailto:bqt at softjar.se>> wrote:
> >>
> >>     Well, just taking a peek at CURLY, I can also tell that you have not
> >>     managed to get the multinet links up and running, but are
> >> communicating
> >>     with DECnet over ethernet. :-)
> >>
> >>         Johnny
> >>
> >>     On 2019-06-09 02:20, Kurt Hamm wrote:
> >>      > That's it!  Everything works great.  I have the node list and can
> >>     access
> >>      > reachable nodes from the PDP-11.
> >>      >
> >>      > This is just really wonderful.
> >>      >
> >>      > As a thank you, I will leave the mailing list alone for a
> >> while.  ha!
> >>      >
> >>      > Kurt
> >>      >
> >>      > On Sat, Jun 8, 2019 at 6:42 PM Johnny Billquist <bqt at softjar.se
> >>     <mailto:bqt at softjar.se>
> >>      > <mailto:bqt at softjar.se <mailto:bqt at softjar.se>>> wrote:
> >>      >
> >>      >     Ok, a quick rundown on some of the more esoteric details
> >>     about lines
> >>      >     and
> >>      >     circuits might be useful here.
> >>      >
> >>      >     First of all, Kurt, you might want to redo the NETGEN and not
> >>     set the
> >>      >     system up for DECnet routing. It takes a lot of resources,
> >>     and if you
> >>      >     don't really want it, you are much better off with a system
> >>     not even
> >>      >     generated for it.
> >>      >
> >>      >     The question about remote nodes are just for an initial
> >>     population of
> >>      >     your local nodename database. All you need there is really to
> >>     define
> >>      >     MIM
> >>      >     (1.13). You can then copy the whole nodename database from
> >>     MIM over to
> >>      >     your machine that way instead. Let me know if you want some
> >>     details on
> >>      >     that step.
> >>      >
> >>      >
> >>      >     On 2019-06-08 22:25, Mark Matlock wrote:
> >>      >      > Kurt,
> >>      >      >     If you want two circuits like UNA-0 and IP-0-0 I
> >> think you
> >>      >     have to
> >>      >      > be a routing node (but not an area router).
> >>      >
> >>      >     Not really, but maybe. If you define multiple circuits, and
> >>     are an
> >>      >     end-node, only one circuit will be active. But others can
> >>     exist, and
> >>      >     the
> >>      >     system will fall back to some other circuit if the active one
> >>     goes
> >>      >     down.
> >>      >     So it can be used as a back connection.
> >>      >
> >>      >     However, even as an end-node, you can have several *lines*
> >> on and
> >>      >     active
> >>      >     at the same time. And this is a trick to use if you want
> >>      >     DECnet-over-IP,
> >>      >     but want to be an endnode. You need ethernet for TCP/IP to
> >>     work, but
> >>      >     you
> >>      >     do not want DECnet to use the ethernet circuit.
> >>      >
> >>      >     But you configure one IP line as well, and that is the one
> >>     DECnet will
> >>      >     be using. Meanwhile, TCP/IP is using the ethernet line.
> >>      >
> >>      >     It might sound a little confusing, but think about it for a
> >>     second, and
> >>      >     I hope it becomes clear. Otherwise, just ask, and I'll try to
> >>      >     explain it
> >>      >     better.
> >>      >
> >>      >      > Also, you should define all the nodes you want to talk
> >> to with
> >>      >     NCP in
> >>      >      > one of the startup files or do it with CFE but I prefer
> >>     startup
> >>      >     so it’s
> >>      >      > simple to change.
> >>      >
> >>      >     I would actually say that you wouldn't. Of course, there is
> >>     nothing
> >>      >     wrong in doing this, but if you want the full HECnet nodename
> >>     database,
> >>      >     it contains 700 nodes. That will take a while to type in.
> >>      >
> >>      >     However, you can copy the nodename database from another
> >>     DECnet node,
> >>      >     and then use this.
> >>      >
> >>      >     But you need at least the nodename of someone where you will
> >>     be copying
> >>      >     from to start with, which is why I suggested adding MIM at
> >>     the start.
> >>      >
> >>      >     After that, there is [5,54]NNC which is the nodename
> >>     collector task.
> >>      >     Run
> >>      >     it, collect names from another node, and build a new database
> >>     with
> >>      >     this.
> >>      >     Then stop and restart the node name server, and you have all
> >>     the nodes
> >>      >     defined.
> >>      >
> >>      >     (The node name server is managed by the command SCP.
> >>      >     So, SCP STOP followed by SCP START will do it.)
> >>      >
> >>      >         Johnny
> >>      >
> >>      >     --
> >>      >     Johnny Billquist                  || "I'm on a bus
> >>      >                                         ||  on a psychedelic trip
> >>      >     email: bqt at softjar.se <mailto:bqt at softjar.se>
> >>     <mailto:bqt at softjar.se <mailto:bqt at softjar.se>>             ||
> >>      >     Reading murder books
> >>      >     pdp is alive!                     ||  tryin' to stay hip" -
> >>     B. Idol
> >>      >
> >>
> >>     --     Johnny Billquist                  || "I'm on a bus
> >>                                         ||  on a psychedelic trip
> >>     email: bqt at softjar.se <mailto:bqt at softjar.se>             ||
> >> Reading murder books
> >>     pdp is alive!                     ||  tryin' to stay hip" - B. Idol
> >>
> >
>
> --
> 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
>
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