This is a multi-part message in MIME format. --------------EE557BA9282D069CB966A2FB Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Hello Pavel What you mean by another oVirt instance ? In one Datacenter it has 2 different clusters (or Datacenter in oVirt way of orrganizing things), but in the other Datacenter the oVirt Node is standlone. Let me know. Fernando On 12/07/2017 16:49, Pavel Gashev wrote:
Fernando,
It looks like you have another oVirt instance in the same network segment(s). Don’t you?
*From: *<users-bounces@ovirt.org> on behalf of FERNANDO FREDIANI <fernando.frediani@upx.com> *Date: *Wednesday, 12 July 2017 at 16:21 *To: *"users@ovirt.org" <users@ovirt.org> *Subject: *[ovirt-users] Bizzare oVirt network problem
Hello.
I am facing a pretty bizzare problem in two of my Nodes running oVirt. A given VM running a few hundred Mbps of traffic simply stops passing traffic and only recovers after a reboot. Checking the bridge with 'brctl showmacs BRIDGE' I see the VM's MAC address missing during this event.
It seems the bridge simply unlearn the VM's mac address which only returns when the VM is rebooted. This problems happened in two different Nodes running in different hardware, in different datacenter, in different network architecture, different switch vendors and different bonding modes.
The main differences these Nodes have compared to others I have and which don't show this problem are: - The CentOS 7 installed is a Minimal installation instead of oVirt-NG - The Kernel used is 4.12 (elrepo) instead of the default 3.10 - The ovirtmgmt network is used also for the Virtual Machine showing this problem.
Has anyone have any idea if it may have anything to do with oVirt (any filters) or any of the components different from a oVirt-NG installation ?
Thanks Fernando
--------------EE557BA9282D069CB966A2FB Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body bgcolor="#FFFFFF" text="#000000"> <p>Hello Pavel</p> <p>What you mean by another oVirt instance ? In one Datacenter it has 2 different clusters (or Datacenter in oVirt way of orrganizing things), but in the other Datacenter the oVirt Node is standlone.</p> <p>Let me know.</p> <p>Fernando<br> </p> <br> <div class="moz-cite-prefix">On 12/07/2017 16:49, Pavel Gashev wrote:<br> </div> <blockquote type="cite" cite="mid:E517ED46-B6FF-4F0A-9DD5-D04E4578AA4C@acronis.com"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <meta name="Title" content=""> <meta name="Keywords" content=""> <meta name="Generator" content="Microsoft Word 15 (filtered medium)"> <style><!-- /* Font Definitions */ @font-face {font-family:Arial; panose-1:2 11 6 4 2 2 2 2 2 4;} @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4;} @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm; margin-bottom:.0001pt; font-size:12.0pt; font-family:"Times New Roman";} a:link, span.MsoHyperlink {mso-style-priority:99; color:#0563C1; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:#954F72; text-decoration:underline;} span.EmailStyle17 {mso-style-type:personal-reply; font-family:Calibri; color:windowtext;} span.msoIns {mso-style-type:export-only; mso-style-name:""; text-decoration:underline; color:teal;} .MsoChpDefault {mso-style-type:export-only; font-size:10.0pt;} @page WordSection1 {size:595.0pt 842.0pt; margin:2.0cm 42.5pt 2.0cm 3.0cm;} div.WordSection1 {page:WordSection1;} --></style> <div class="WordSection1"> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri;mso-fareast-language:EN-US">Fernando,<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri;mso-fareast-language:EN-US"><o:p> </o:p></span></p> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri;mso-fareast-language:EN-US">It looks like you have another oVirt instance in the same network segment(s). Don’t you?<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri;mso-fareast-language:EN-US"><o:p> </o:p></span></p> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri;mso-fareast-language:EN-US"><o:p> </o:p></span></p> <div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm"> <p class="MsoNormal"><b><span style="font-family:Calibri;color:black">From: </span> </b><span style="font-family:Calibri;color:black"><a class="moz-txt-link-rfc2396E" href="mailto:users-bounces@ovirt.org"><users-bounces@ovirt.org></a> on behalf of FERNANDO FREDIANI <a class="moz-txt-link-rfc2396E" href="mailto:fernando.frediani@upx.com"><fernando.frediani@upx.com></a><br> <b>Date: </b>Wednesday, 12 July 2017 at 16:21<br> <b>To: </b><a class="moz-txt-link-rfc2396E" href="mailto:users@ovirt.org">"users@ovirt.org"</a> <a class="moz-txt-link-rfc2396E" href="mailto:users@ovirt.org"><users@ovirt.org></a><br> <b>Subject: </b>[ovirt-users] Bizzare oVirt network problem<o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <p class="MsoNormal"><span style="font-family:Arial">Hello.<br> <br> I am facing a pretty bizzare problem in two of my Nodes running oVirt. A given VM running a few hundred Mbps of traffic simply stops passing traffic and only recovers after a reboot. Checking the bridge with 'brctl showmacs BRIDGE' I see the VM's MAC address missing during this event.<br> <br> It seems the bridge simply unlearn the VM's mac address which only returns when the VM is rebooted.<br> This problems happened in two different Nodes running in different hardware, in different datacenter, in different network architecture, different switch vendors and different bonding modes.<br> <br> The main differences these Nodes have compared to others I have and which don't show this problem are:<br> - The CentOS 7 installed is a Minimal installation instead of oVirt-NG<br> - The Kernel used is 4.12 (elrepo) instead of the default 3.10<br> - The ovirtmgmt network is used also for the Virtual Machine showing this problem.<br> <br> Has anyone have any idea if it may have anything to do with oVirt (any filters) or any of the components different from a oVirt-NG installation ?<br> <br> Thanks<br> Fernando<br> <br> </span><o:p></o:p></p> </div> </blockquote> <br> </body> </html> --------------EE557BA9282D069CB966A2FB--