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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Hi Gérard,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Are you running the same version of OpenVMS on both the rx2660 which worked and the rx2880 which didn’t?<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>I asked if you’ve observed any packets making it to the wire. Did you check that?<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>One way or another there may be a problem putting packets on the wire, there may be a problem receiving packets from the wire, or Both.<o:p></o:p></span></p><p class=MsoNormal><a name="_MailEndCompose"><span style='color:#1F497D'>Dave’s comment:<o:p></o:p></span></a></p><p class=MsoNormal><span style='color:#1F497D'>> 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.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>This might indeed be a factor if the kernel interfaces to pass data to the TOE are different than the interfaces which the drivers is using.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>The current sim_ether code is completely tolerant of jumbo packets and/or interactions with a TOE as long as the packet capture interface can actually get data (at least for IPv4 traffic, IPv6 is a round-tuit project).<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>If there is a TOE in the picture, maybe there is a mechanism to disable it which would hopefully get the desired kernel interfaces to be used and let pcap_vms work…<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='color:#1F497D'><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='color:#1F497D'>Mark<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><b><span style='color:windowtext'>From:</span></b><span style='color:windowtext'> Simh [mailto:simh-bounces@trailing-edge.com] <b>On Behalf Of </b>Hittner, David T (IS)<br><b>Sent:</b> Monday, March 28, 2016 6:45 AM<br><b>To:</b> gérard Calliet <gerard.calliet@pia-sofer.fr>; simh@trailing-edge.com<br><b>Subject:</b> Re: [Simh] EXT : simh on openvms (to get a VAX on top of an OpenVMS Itanium) >> network issue<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='color:#1F497D'>PCAP-VMS is kind of strange software.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>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.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>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. </span><span style='font-family:Wingdings;color:#1F497D'>J</span><span style='color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>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.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Dave<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><b><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif;color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif;color:windowtext'> Simh [mailto:simh-bounces@trailing-edge.com] <b>On Behalf Of </b>gérard Calliet<br><b>Sent:</b> Sunday, March 27, 2016 6:37 PM<br><b>To:</b> simh@trailing-edge.com<br><b>Subject:</b> EXT :[Simh] simh on openvms (to get a VAX on top of an OpenVMS Itanium) >> network issue<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hello,<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I need help for pcap-vms. I use (vax-)simh on top of OpenVMS (VSI) Itanium i4.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I tested vax-simh (simh 4.0 beta) and pcap-vms on OpenVMS on an Itanium rx2660, and it worked fine. <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>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.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Can you give me advice, way of tracing the problem, hypothesis ? <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>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.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I rebuilt the pcap-vms from scratch on the i4 host, and the problem remains.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Do you think there could be an hardware issue, like the NIC which cannot work in promiscuitus mode ?<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Any help should be welcomed,<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Gérard Calliet<o:p></o:p></p></div></div></body></html>