[Info-vax] Reject Cause=Invalid Message Format, Erroneous Transport PDU='386200BD00000005'H

[Johnny Billquist]

On 2016-11-27 14:51, Supratim Sanyal wrote:
>> You can not use NCP to get similar 'bogus' Phase IV information from
>> another Phase V node.
>
> Thanks, that is indeed the case. I can run NCP commands from RSX-11M-PLUS (NSP version = 4.0.0, Routing version = 2.0.0, Type = Endnode IV) to both VAXen (running DECnet Plus/OSI) but cannot get NCP to work between the two VAXen.

To be correct:
There is a subset of NCP available on Phase V nodes, which can be used 
to talk, in some limited form to Phase IV nodes.
If you want to talk between Phase V nodes, you need to use whatever 
protocol they designed in Phase V, as it appears Phase V nodes do not 
have a NICE listener.
Also, there is something slightly broken in Phase V with regards to 
Phase IV compatibility in other aspects as well, as can be seen by my 
reply of how a VMS and RSX box (both on phase IV) gives different errors 
when trying to talk NICE to a Phase V node.

> NCL does work between the two VAXen.

That would be expected, yes.

> I am trying to write a script to walk a mixed list of Phases IV and V nodes and get status, running from one of the DECnet Plus/OSI/Phase V nodes. This NCP for Phase IV and NCL for Phase V introduces a new twist.

Could you please redesign that thing. I'm getting lots of logs about you 
trying to access machines I control, on which you do not have access.

> Is there a way to find out from a Phase V node what protocol another node is running (Phase IV or V) so that I can conditionally run NCP or NCL from the script?

I can't answer that one, as I avoid Phase V. :-)

	Johnny

-- 
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