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OpenVMS Hobbyist Program | Alpha Systems Forums | Emulated Alpha Forum
Author VirtualBox Bridged Adapter - runs LAT/DECnet but not SCS?
etmsreec
Member

Posts: 18
Joined: 15.02.07
Posted on February 15 2013 01:13
I'm running FreeAXP and EMU VM on a Windows 7 laptop and bridging the two adapters with the VirtualBox Bridge that also has a Solaris VM connected to it.

The VirtualBox bridge passes LAT and DECnet without any issue, but it seems that it doesn't like SCS? I can create two single-host clusters, but the two systems seem unable to become a single cluster.

Any ideas please?

The situation is the same if using the Microsoft network bridge too.

I'm reluctant to put the emulators onto a real ethernet on the laptop as it's on a corporate network.

Thanks in advance
Steve
Author RE: VirtualBox Bridged Adapter - runs LAT/DECnet but not SCS?
Bruce Claremont
Member

Posts: 502
Joined: 07.01.10
Posted on February 15 2013 03:20
SCS is very sensitive to timing. One of the following might help:
- Limit the NIC speed in Windows device settings to 100Mb or 10Mb.
- Connect some USB NICs, one per emulator. Test running through a 10/100 switch.

It is also possible that somewhere along the way the SCS packets are not recognized and are thrown out. Make sure the virtual network components are in promiscuous mode.
Author RE: VirtualBox Bridged Adapter - runs LAT/DECnet but not SCS?
malmberg
Moderator

Posts: 462
Joined: 15.04.08
Posted on February 17 2013 12:45
I have FreeAXP running on a Windows 7 64 bit, and also a SimH system running on a Linux VM on the same host.

I have documented this in the FreeAXP forum. Some versions back, the Paravirtualized network drivers stopped working for SCS and other traffic loads under Virtualbox. Switching to emulated drivers allows full functionality.
Author RE: VirtualBox Bridged Adapter - runs LAT/DECnet but not SCS?
etmsreec
Member

Posts: 18
Joined: 15.02.07
Posted on February 27 2013 04:32
I think I'm being a bit slow today, John. Are the emulated drivers on the FreeAXP/GnuVM side or on the VirtualBox or somewhere else entirely?
I've clicked onto using the real ethernet on the laptop today. Again, no SCS seems to pass and the config stays as two separate one-node clusters. smiley
Author RE: VirtualBox Bridged Adapter - runs LAT/DECnet but not SCS?
malmberg
Moderator

Posts: 462
Joined: 15.04.08
Posted on February 28 2013 03:04
To be more clear, for the Windows VM, I told virtual box to emulate a set of real physical adapters for the "Network interfaces" dedicated to the FreeVMS instance. This is more CPU overhead than using the paravirtualized I/O drivers. The paravirtualized drivers for Windows need to be downloaded from the Windows side.

With VMs you will always get the best performance with enabling any paravirtualization that you can.

Unfortunately the later versions of Virtualbox, W7, and FreeAXP, and the paravirtualized driver are not compatible.

I am not having any problem with Virtualbox, Ubuntu Linux, SimH, and the paravirtualized driver.

I have 4 network adapters set up for each VM. 2 for the OS on the VM, and 2 for the emulated VAX or Alpha running on the VM.

So each VM OS and each emulated VMS system has one network adapter on a private network and one bridged to the physical network adapter. So the host system, the VMs, and the emulators have both a private network to communicate on and a public network. SCS, LAT, DECNET IV, all work on both networks.

I think that you have to set the promiscuous mode to allow VMs or allow ALL for non TCP/IP traffic to be passed. The default setting is to deny it.
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bhamakripa
June 24 2018
I am trying OpenVMS via SIMH. Need to get OS binaries for v7.3. Registered here but don't have any membership number yet which is needed to get license. Pls suggest what to do. I hardly know anyth

basilh
June 05 2018
Any other forum members in Perth, Australia?

LouF91
April 05 2018
ah maybe they love that!

malmberg
March 24 2018
Probably. More people hang out on the comp.os.vms newsgroup.

vaxpert
March 23 2018
I have a PE42A and other Alpha system stuff for sale. I'm in So California. Any interest out there?

goodbyespy
February 27 2018
To Prohorenko. Please, visit group OpenVMS in the ok.ru

peteherrera
February 24 2018
How much does it cost to buy a complete OpenVMS hardcopy documentation set of the latest version

prohorenko
February 17 2018
Please help to obtain the license on OpenVMS

malmberg
December 12 2017
HPE only makes the most current version of OpenVMS Alpha / IA64 /VAX available to hobbyists. When I had access to the Alliance 1 program it was the same. No public downloads are allowed by HPE.

nmbonao
December 08 2017
Is anybody knows OpenVMS 8.2 version downloadable version? or CD copy? Thank you very much

aarommes
December 02 2017
Bitcoin and Blockchain enthusiasts ( plus distributed computing ) please connec / reply: http://www.openvmshobbyis
t.com/forum/viewthread.ph
p?forum_id=130&thread_id=
2991


malmberg
September 10 2017
https://sourceforge.net/p
/vms-ports/wiki/VMSInstal
lation/ For the most part just use VMS 6.1 media instead of 7.3. But why run the older release?


DoeveR
August 07 2017
Where can I find the write up on running VMS 6.1 using the simh emulator?

Bart
March 20 2017
Happy to have found my password again!

pintero
March 16 2017
peteherrera. Agreed.

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