Thanks a lot for these precisions.
I have just contacted VSI, and we will see what they say.
If anyone thinks he could help on the very difficult subject of VMS
internals involved here, and has not an i4 on OpenVMS 8.4-1h1 in his
laboratory, he should contact me and use my environment by vpn.
Gérard Calliet
Le 28/03/2016 15:44, Hittner, David T (IS) a écrit :
PCAP-VMS is kind of strange software.
OpenVMS provides a PCAP library, which is not a full or complete
implementation of the PCAP functionality found on other platforms. It
is good enough for Ethernet packet dumping, but was not good enough
for full—featured PCAP, which is why PCAP-VMS was written. PCAP-VMS is
unsupported software that was written by a Digital/Compaq/HP OpenVMS
engineer and depends on some undocumented interfaces in the OpenVMS
network drivers to implement functionality. If VSI changed those
undocumented APIs, it may have broken PCAP-VMS. You may need to
contact VSI support and ask them if any of the network interfaces has
changed that might break PCAP-VMS, and what might need to be fixed in
PCAP-VMS to work with VSI OpenVMS.
You might also ask them to support a full-featured PCAP library in the
future, so that we don’t need PCAP-VMS any more. J
Just as a guess, does the newer rx2800 use TOE (TCP Offload Engine)
network cards or use jumbo packets? That could change the “standard”
Ethernet packet behavior enough that PCAP-VMS may no longer work.
Dave
*From:*Simh [mailto:[email protected]] *On Behalf Of
*gérard Calliet
*Sent:* Sunday, March 27, 2016 6:37 PM
*To:* [email protected]
*Subject:* EXT :[Simh] simh on openvms (to get a VAX on top of an
OpenVMS Itanium) >> network issue
Hello,
I need help for pcap-vms. I use (vax-)simh on top of OpenVMS (VSI)
Itanium i4.
I tested vax-simh (simh 4.0 beta) and pcap-vms on OpenVMS on an
Itanium rx2660, and it worked fine.
On OpenVMS i4 (rx2880), with exactly the same configuration, and
images, I can see my NICs from the simh prompt (sho eth), I can attach
a device (attach xq0 ethn), assign it a mac address, and my VAX-VMS on
top of simh sees the emulated device, can send data, but does not
receive anything.
Can you give me advice, way of tracing the problem, hypothesis ?
I tried to boot the OpenVMS host in startup_p1 MIN, to test if I get
the same problem when there is no network software on the host (like
DecNet, or Tcpip), and the problem remains.
I rebuilt the pcap-vms from scratch on the i4 host, and the problem
remains.
Do you think there could be an hardware issue, like the NIC which
cannot work in promiscuitus mode ?
Any help should be welcomed,
Gérard Calliet
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