[Simh] Raspberry Pi 3 with tun/tap causes XQ to fail

[Jeremy Begg]

Hi Wilm,

Thanks for the clarification :-)
I had already worked out the changes to the commands to get the IP setup, but it appears under “stretch” the set of commands in your note are not quite right.
(I realise your example closely matches the SIMH documentation.)

HOWEVER, I am pleased to report success!

I was reading the blog at https://mansfield-devine.com/speculatrix/2016/03/networking-vax-openvms-on-simh-the-raspberry-pi/ and he produces much the same configuration, with one very important difference: in his system, the tap0 interface is assigned an IP address (in addition to br0).  As soon as I did that, it started working!

Perhaps this is specific to raspbian “stretch”?  I notice from several discussion forums that many people are not happy with the networking changes made in this release.

Anyway, thanks for your time.

Regards,

	Jeremy Begg


> On 13 Nov 2017, at 11:13 PM, Wilm Boerhout <wboerhout at gmail.com> wrote:
> 
> Jeremy Begg schreef op 13-11-2017 om 13:38:
>> Hi Wilm,
>> 
>> Thank you for the prompt reply.
>> 
>>> On 13 Nov 2017, at 9:43 PM, Wilm Boerhout <wboerhout at gmail.com> <mailto:wboerhout at gmail.com> wrote:
>>> 
>>> Jeremy Begg schreef op 13-11-2017 om 11:03:
>>>> Hi,
>>>> 
>>>> I am trying to get SIMH up and running on the ethernet interface of a
>>>> Raspberry Pi 3.  I have followed the intructions in 0readme_ethernet.txt,
>>>> installing the libpcap-dev, bridge-utils and uml-utilities packages before
>>>> building SIMH itself.  I just ran 'make vax' and let it go, and the build to
>>>> completion.
>>>> 
>>> [snip]
>>> 
>>> My TUN/TAP and bridge are set up in /etc/rc.local in Raspbian (jessie & stretch), as follows:
>> Are you sure this applies to the machine running the “stretch” release?
>> The ‘ifconfig’ command on that system (well, on mine, anyway!) doesn’t display “inet addr” anywhere in its output, it just has “inet”.
>> So the various grep commands in your example don’t work.
>> 
>> Thanks
>> 
>> 	Jeremy Begg
> Oops, my bad. I did not realize that this Pi is the one remaining that still runs jessie. I hate to convert because it doubles as my OpenVPN server.
> 
> Anyway, for stretch, the setup is the same, aprt from:
> 
> # get current IP params
> HOSTIP=`ifconfig $IFACE | grep "inet " | gawk -- '{ print $2 }'`
> HOSTNM=`ifconfig $IFACE | grep "inet " | gawk -- '{ print $4 }'`
> HOSTBC=`ifconfig $IFACE | grep "inet " | gawk -- '{ print $6 }'`
> HOSTGW=`route -n | grep ^0.0.0.0 | gawk -- '{ print $2 }'`
> 
> /Wilm

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