<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">The best solution would be a good OVS routing table patch as quoted.<div class=""><br class=""><div class="">Maybe BIRD developers can help, since they are native C developers.<div class=""><div><br class=""></div><div>We also tried bird on native (K)VM network interfaces. Since they are some kind of SW</div><div>emulation too, we hit on unrecoverable network IRQ problems, thus overloaded OVS is</div><div>still better solution for us.</div><div><br class=""></div><div>Regards,</div><div>saso</div><div><br class=""><blockquote type="cite" class=""><div class="">On 6 May 2019, at 21:01, Kees Meijs <<a href="mailto:kees@nefos.nl" class="">kees@nefos.nl</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252" class="">
<div text="#000000" bgcolor="#FFFFFF" class="">
Hi Saso,<br class="">
<br class="">
Thank you very much. OVS is new in the mix (we're not replacing
Quagga alone) as well. Obviously we didn't expect this to happen.<br class="">
<br class="">
I'll see if patching OVS in Debian in a similar way works for us or
if another approach fits better (i.e. maybe not using OVS at all).<br class="">
<br class="">
If you'll know of a better more upgrade-and-maintainance-proof
solution I would welcome more information.<br class="">
<br class="">
Regards,<br class="">
Kees<br class="">
<br class="">
<div class="moz-cite-prefix">On 06-05-19 20:40, Saso Tavcar wrote:<br class="">
</div>
<blockquote type="cite" cite="mid:4504A883-9C7C-4E9D-A53B-ED988326375D@ais42.net" class="">
<div class="">this is an OVS issue, already discussed:</div>
<div class="">
<div class=""><br class="">
</div>
<div class=""><a href="https://mail.openvswitch.org/pipermail/ovs-discuss/2016-November/043007.html" moz-do-not-send="true" class="">https://mail.openvswitch.org/pipermail/ovs-discuss/2016-November/043007.html</a></div>
<div class="">...</div>
<div class=""><font color="#0068da" class=""><span style="caret-color: rgb(0, 104, 218);" class=""><u class=""><a href="https://mail.openvswitch.org/pipermail/ovs-discuss/2016-November/043063.html" moz-do-not-send="true" class="">https://mail.openvswitch.org/pipermail/ovs-discuss/2016-November/043063.html</a></u></span></font></div>
<div class=""><font color="#0068da" class=""><span style="caret-color: rgb(0, 104, 218);" class=""><u class=""><br class="">
</u></span></font></div>
<div class="">Official OVS quote:</div>
<div class="">
<pre style="white-space: pre-wrap; background-color: rgb(255, 255, 255);" class="">><i class=""> We'd accept patches to improve OVS's routing table code. It's not
</i>><i class=""> designed to scale to 1,800,000 routes. We'd also take code to suppress
</i>><i class=""> the routing table code in cases where it isn't actually needed, since
</i>><i class=""> it's not always needed. But we can't take a patch to just delete it;
</i>><i class=""> I'm sure you understand.</i></pre>
</div>
<div class="">I tried to apply this patch at that time, but was
already useless for newer versions:</div>
<div class=""><br class="">
</div>
<div class=""><font color="#0068da" class=""><span style="caret-color: rgb(0, 104, 218);" class=""><u class=""><a href="https://mail.openvswitch.org/pipermail/ovs-discuss/attachments/20161123/5379b333/attachment.bin" moz-do-not-send="true" class="">https://mail.openvswitch.org/pipermail/ovs-discuss/attachments/20161123/5379b333/attachment.bin</a></u></span></font></div>
<div class=""><br class="">
</div>
<div class="">Our workaround was to scale VM with 3 vCPU-s,
since our average system load is 1.5 for BGP.</div>
<div class=""><br class="">
</div>
<div class="">You can see what is happening:</div>
<div class=""><br class="">
</div>
<div class="">
<div style="margin: 0px; font-stretch: normal; font-size:
11px; line-height: normal; font-family: Menlo;
background-color: rgb(171, 205, 239);" class=""><span style="font-variant-ligatures: no-common-ligatures" class=""></span></div>
</div>
</div>
</blockquote>
<br class="">
</div>
</div></blockquote></div><br class=""></div></div></div></body></html>