[Simh] VAX/VMS 6.2 DECnet turned off, still resetting MAC address

[Bill Deegan]

Mark,

See responses inline.

On Tue, Oct 20, 2015 at 2:39 PM, Mark Pizzolato - Info Comm <
Mark at infocomm.com> wrote:

> Hi Bill,
>
>
>
> I’m still looking for details on your network vision/requirements:
>
>
>
> Do you expect communicate between the host system and the simulated VMS
> environment?  If so, how were you thinking you’d achieve this?
>

No need.


>
>
> Historical questions relating to some possible solutions to achieve the,
> as yet not completely specified, network goals:
>
>
>
> Have you previously had LAT enabled on the original VMS system?
>

Yes. But no longer needed. LAT startup has been commented out.


>
>
> Was this VMS system ever part of a VMS Cluster environment?
>

Yes.  But no longer needed.


-Bill

>
>
> - Mark
>
>
>
> *From:* Bill Deegan [mailto:bill at baddogconsulting.com]
> *Sent:* Tuesday, October 20, 2015 2:21 PM
> *To:* Mark Pizzolato - Info Comm <Mark at infocomm.com>
> *Cc:* simh at trailing-edge.com
> *Subject:* Re: [Simh] VAX/VMS 6.2 DECnet turned off, still resetting MAC
> address
>
>
>
> Mark,
>
> The system is running multinet, so accessing the system vi TCP/IP and
> telnet will be sufficient for this application.
>
> Not cluster not decnet needed.
>
> -Bill
>
>
>
> On Tue, Oct 20, 2015 at 1:55 PM, Mark Pizzolato - Info Comm <
> Mark at infocomm.com> wrote:
>
> Hi Bill,
>
> You want VMS to not try and change the MAC address.
>
> On Tuesday, October 20, 2015 at 1:31 PM, Bill Deegan wrote:
> > I'm migrating a VMS 6.2 system from real hardware to simh VAX.
> > We're running on EC2 so DECnet's a no go.
>
> So, exactly how do you plan/want to access the simulated VAX?
>
> What do you envision the network to look like?
>
> > We've disabled the DECnet startup on the system, but when I turn on
> tracing I see:
> > DBG(42740138541)+> XQ ETH: writing  dst: 02:41:0C:98:92:09  src:
> AA:00:04:00:20:10  proto: 0x0800  len: 98  crc: B5981F43
> >
> > Is there a way to enable the debugging before booting up the VAX?
>
> The same debugging commands that enabled the above XQ debug output can
> certainly be put in the vax configuration file.
>
> I'm not sure how that will help anything.
>
> > Barring that is there a way to prevent simh catching the "setup packet"
> and changing the SRC MAC address?
>
> Something in VMS is changing the MAC address on the simulated interface by
> issuing the appropriate I/O operations to do this.  It may be DECnet or it
> may also be other networking things on the system.
>
> Before we dig into the details of that, answering the above questions
> about how you envision the network to look will be more helpful.
>
> - Mark
>
>
>
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