<div dir="ltr"><div><div><div><div>Hello Gianluca,<br><br></div>Not sure if I can help with this one, but could you just clarify from where these DHCPv6 packets arrive?<br></div>You mentioned IPv6 is disabled on the VM, therefore I assume these are ingress packets, right?<br></div><div>If this is the case, then perhaps the stack just drops the ingress packets (as it has no handler for them).<br></div><div><br></div>Thanks,<br></div>Edy.<br><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Nov 10, 2017 at 11:33 AM, Gianluca Cecchi <span dir="ltr"><<a href="mailto:gianluca.cecchi@gmail.com" target="_blank">gianluca.cecchi@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hello,<div>on some Oracle Linux 7 VMs I see that dropped RX packets continue to increase.</div><div>The eth0 interface is virtio for all of them.</div><div>When running tcpdump on eth0 the counter stop increasing and so it means tcpdump does capture them</div><div><br></div><div>I found some references about these kind of rx dropped frames with CentOS 7 too and other distros with new kernels.</div><div><br></div><div>eg:</div><div><a href="https://www.netiq.com/support/kb/doc.php?id=7007165" target="_blank">https://www.netiq.com/support/<wbr>kb/doc.php?id=7007165</a><br></div><div>and</div><div><font color="#1155cc"><u><a href="https://serverfault.com/questions/528290/ifconfig-eth0-rx-dropped-packets" target="_blank">https://serverfault.com/<wbr>questions/528290/ifconfig-<wbr>eth0-rx-dropped-packets</a></u></font><br></div><div><br></div><div>In my case it doesn't seem that the nature of the dropped packages is STP, but IP6</div><div><br></div><div>On my VMs I have disabled ipv6</div><div><br></div><div>I see that in about 100 seconds I have 180 dropped frames occured, and when running tcpdump for the same amount of time I have in it about 180 DHCPv6 packets, so I presume it is it the responsible</div><div>Any way to avoid this, at VM or hypervisor level?</div><div><br></div><div>Thanks in advance,</div><div>Gianluca</div></div>
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