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

[Supratim Sanyal]

> 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.

NCL does work between the two VAXen.

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.

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?

Thanks again,

Supratim






In article <odr_z.5926$gr2.1438 at fx20.ams1>, munk at home.nl says...
> 
> Scott Dorsey wrote:
> > Supratim Sanyal wrote:
> >> Hi,
> >>
> >> I am no network expert and looking for help.
> >>
> >> Two SIMH OpenVMS 7.3 DECnet Plus nodes - QCOCAL (1.550) and CLOUDY
> >> (1.551), connected over Johnny's UDP bridge. FAL directories across the
> >> network work fine. However I cannot get NCP status from the remote host
> >> from either. Also the circuits do not seem to be setting themselves up,
> >> I don't know if that is a cause or effect of the Remote Protocol Errors.
> >>
> >> Note: A SIMH PDP-11/24 (JUICHI, 1.552) runnign RSX-11M-PLUS is colocated
> >> (running on the same linux host) with CLOUDY, and NCP queries somehow
> >> work fine to it.
> >
> > RSX-11+ supports Phase V?
> > I don't think it does.
> >
> > So, if the query is working on the RSX-11 node, it is likely a Phase IV
> > query.  And likely won't work on the Phase V node.
> >
> > Mixing Phase V and Phase IV can be done but is best avoided.
> > --scott
> >
> 
> He didn't say that the RSX node is running Phase V, it clearly is 
> running Phase IV.
> 
> What he is showing is this:
> 
> You can use NCP on a Phase V node to get information from a Phase IV node.
> 
> You can use NCP on a Phase V node to get some (rather bogus) Phase IV 
> information of that same node. Phase V information is somehow 
> 'translated' into Phase IV information.
> 
> You can not use NCP to get similar 'bogus' Phase IV information from 
> another Phase V node.
> 
> I'm not surprised.
> 
> DECnet information of a Phase V node should be retrieved with NCL, not 
> NCP. The same applies to Phase V information from another Phase V node.