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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Hello,<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'>From symptoms, it looks like ARP cache expiration issue.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Please check ARP cache settings on your network equipment.<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'>We haven’t seen such massive reports.<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'>Best regards, <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><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'> users-bounces@openvz.org [mailto:users-bounces@openvz.org] <b>On Behalf Of </b>jjs - mainphrame<br><b>Sent:</b> Saturday, December </span><span lang=RU style='font-size:11.0pt;font-family:"Calibri",sans-serif'>12, 2015 6:18<br><b>To:</b> users@openvz.org<br><b>Subject:</b> [Users] OVZ 7 network issues (vz host stops answering arp requests)<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Greetings, <o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I've been running some servers in OVZ 7 containers for some months now, and I'm happy with reliability and performance, with the exception of an occasional loss of ct network connectivity.<br><br>From time to time, I'll get a xymon alert that all containers are unreachable. The cts are all using host routing. What I see, when I examine any affected ct, is this:<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>The container no longer responds to ping, even from the local lan.<o:p></o:p></p></div><div><p class=MsoNormal>The vz host and container can connect to each other <o:p></o:p></p></div><div><p class=MsoNormal>The container can not reach anything beyond the host.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>When I enter the container and ping another box, the pings are received, but the box can not return the pings as the arp request goes unanswered. For some reason the vz host forgets about the cts, and it's always all of them. This is 2 Centos 7 boxes, running OVZ 7 beta and OVZ 7 factory<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Doing a vzctl restart on each affected ct restores connectivity. Has anyone else seen this issue?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Regards,<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div></body></html>