<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hello.<div class="">Thanks a lot Erik my problem was the MTU. </div><div class=""><div class="">if I go back to a situation with MTU=1500 everywhere, all is working fine !!! </div><div class=""><br class=""></div><div class="">Is the following configuration possible and if so, how to configure with kolla-ansible files ? :</div><div class=""><br class=""></div><div class="">3 networks:</div><div class=""> - external (2 externals, VLAN 10 and VLAN 20): MTU = 1500</div><div class="">- admin:MTU=1500</div><div class="">- management : MTU = 9000 (a scsi bay stores volumes, with mtu 9000 ok).</div><div class=""><br class=""></div><div class="">Like this: <img apple-inline="yes" id="97B96857-0081-4556-B954-7D7F57904243" width="1149" height="388" src="cid:F4F5A431-7B37-4A80-8F92-6FFF15BCE75F" class=""></div><div class="">`</div><div class="">Thanks a lot if you have a solution for this.</div><div class="">If impossible, I stay with 1500… it’s working, no problem.</div><div class=""><br class=""></div><div class="">
<meta charset="UTF-8" class=""><div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div><span style="color: rgb(31, 73, 125); font-family: Arial, sans-serif; font-size: 10pt; orphans: 2; widows: 2;" class="">Franck </span></div></div></div></div></div></div><br class="Apple-interchange-newline">
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<div><br class=""><blockquote type="cite" class=""><div class="">Le 12 nov. 2022 à 21:00, Franck VEDEL <<a href="mailto:franck.vedel@univ-grenoble-alpes.fr" class="">franck.vedel@univ-grenoble-alpes.fr</a>> a écrit :</div><br class="Apple-interchange-newline"><div class=""><meta charset="UTF-8" class=""><blockquote type="cite" class="" style="font-family: Verdana; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;"><div class="gmail_quote"><div class="">3) Networking issues like mismatched MTU</div></div></blockquote><div class="" style="caret-color: rgb(0, 0, 0); font-family: Verdana; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><br class=""></div><span style="caret-color: rgb(0, 0, 0); font-family: Verdana; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">My MTU (between nodes ) is 9000…. </span><div class="" style="caret-color: rgb(0, 0, 0); font-family: Verdana; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><br class=""></div><div class="" style="caret-color: rgb(0, 0, 0); font-family: Verdana; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div class="">I believe my problem is the MTU.</div><div class=""><br class=""></div><div class="">I modified /etc/kolla/config/neutron.conf and /etc/kolla/config/neutron/ml2_conf.ini.conf</div><div class="">then kolla-ansible -i multinode reconfigures</div><div class=""><br class=""></div><div class="">(case 1 here: <a href="https://docs.openstack.org/newton/networking-guide/config-mtu.html" class="">https://docs.openstack.org/newton/networking-guide/config-mtu.html</a>)</div><div class=""><br class=""></div><div class="">I test again everything and functions that did not work work again but not all....</div><div class=""><br class=""></div><div class="">For example, instances get an ip through dhcp but can't ping the router, but on some networks it works.</div><div class="">However, before the reboot of the servers, I had not had a problem with the MTU of 9000.</div><div class=""><br class=""></div><div class="">I'm going back to a 1500 MTU on Monday on site.</div><div class=""><br class=""></div><div class="">Thank you Eric!!!</div><div class=""><br class=""></div><div class=""><div dir="auto" class="" style="caret-color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div dir="auto" class="" style="caret-color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div dir="auto" class="" style="caret-color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div dir="auto" class="" style="caret-color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div dir="auto" class="" style="caret-color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div class=""><span class="" style="color: rgb(31, 73, 125); font-family: Arial, sans-serif; font-size: 10pt; orphans: 2; widows: 2;">Franck VEDEL</span></div></div></div><div class="" style="orphans: 2; widows: 2; margin: 0cm 0cm 0.0001pt;"><br class=""></div><div class="" style="orphans: 2; widows: 2; font-family: Calibri, sans-serif; font-size: 11pt; margin: 0cm 0cm 0.0001pt;"><br class=""></div></div></div></div><br class="Apple-interchange-newline"></div><div class=""><br class=""></div></div></div></blockquote></div><br class=""></div></div></body></html>