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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Hi David,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>First I would suggest that you run the latest code which has significantly improved networking.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>The latest is available from <a href="https://github.com/simh/simh/archive/master.zip">https://github.com/simh/simh/archive/master.zip</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><a name="_MailEndCompose"><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>It is not clear from the below description, but from what Johnny read ‘in between <o:p></o:p></span></a></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>the lines’ you have both the VAX and PDP11 simulators configured with the same <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>MAC address. This would indeed be an error on your part (and the latest code <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>would tell you that).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Meanwhile, once unique MAC addresses are configured for each simulator (which <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>would happen automatically if you didn’t explicitly have a “SET XQ MAC=…” <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>command using the latest code), then your dedicated to simh NIC model should <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>work well.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>If it doesn’t, please create an issue at </span><a href="https://github.com/simh/simh/issues"><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>https://github.com/simh/simh/issues</span></a><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'> and <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>we can explore the details further.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Good Luck.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Mark<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;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><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Simh [mailto:simh-bounces@trailing-edge.com] <b>On Behalf Of </b>David Coolbear<br><b>Sent:</b> Tuesday, August 23, 2016 10:12 AM<br><b>To:</b> simh@trailing-edge.com<br><b>Subject:</b> [Simh] Packet Loss<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>I have simh running on a Linux host. When I installed simh (compiled from source) the host was running OpenSUSE 13.1. It subsequently was upgraded to 13.2. The Linux host has two NICs - one of them is dedicated to simh. The host os loads the kernel module for the NIC and admins it up, but does not configure an IP address. Both NICs are cabled into a gig-e switch and the switch is cabled into a cable modem.<br><br>When the host was running OpenSUSE 13.1, networking on simh worked perfectly. I'm not certain, but I suspect that it also worked perfectly under 13.2. I recently ran both the PDP11 simulator and the VAX simulator. Both of these had about 50% packet loss when pinging between simulators or between the Linux host and either simulator. <br><br>The pertinent portion of the simh initialization file looks like this:<br> set xq mac=08-00-2B-AA-BB-CC<br> at xq enp4s1<br><br>Where the host's Etherent device is /dev/enp4s1.<br><br>Versions look like this:<br> Host OS = OpenSUSE 13.2<br> simh version = V3.9-0<br> libpcap1-32bit-1.6.2-1.2.x86_64<br> libpcap1-1.6.2-1.2.x86_64<br> libpcap-devel-32bit-1.6.2-1.2.x86_64<br> libpcap-devel-1.6.2-1.2.x86_64<br><br>The pdp11 simulator starts up normally...<br> PDP-11 simulator V3.9-0<br> libpcap version 1.6.2<br> Eth: opened OS device enp4s1<br> Disabling CR<br><br> 73Boot from ra(0,0,0) at 0172150<br> :<br><br>...and networking does work a bit, but shows heavy packet loss...<br><br> # /etc/netstart<br> Assuming NETWORKING system ...<br> add host spdp11: gateway localhost<br> add net default: gateway 192.168.1.1<br> # ping 192.168.1.1<br> PING 192.168.1.1 (192.168.1.1): 56 data bytes<br> 64 bytes from <a href="http://192.168.1.1">192.168.1.1</a>: icmp_seq=1 ttl=64 time=933.352 ms<br> 64 bytes from <a href="http://192.168.1.1">192.168.1.1</a>: icmp_seq=2 ttl=64 time=266.672 ms<br> 64 bytes from <a href="http://192.168.1.1">192.168.1.1</a>: icmp_seq=3 ttl=64 time=250.005 ms<br> ^C<br> --- 192.168.1.1 ping statistics ---<br> 5 packets transmitted, 3 packets received, 40% packet loss<br> round-trip min/avg/max = 250.005/0/933.352 ms<br> #<br><br>Any ideas why this would be?<o:p></o:p></p></div></div></div></body></html>