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<p>Hello Edward, this happened again today and I was able to check
more details.</p>
<p>So:</p>
<p>- The VM stopped passing any network traffic.<br>
- Checking 'brctl showmacs ovirtmgmt' it showed the VM's mac
address missing.<br>
- I then went to oVirt Engine, under VM's 'Network Interfaces'
tab, clicked Edit and changed the Link State to Down then to Up
and it recovered its connectivity.<br>
- Another 'brctl showmacs ovirtmgmt' showed the VM's mac address
learned again by the bridge.</p>
<p>This Node server has the particularity of sharing the ovirtmgmt
with VMs. Could it possibly be the cause of the issue in any way ?</p>
<p>Thanks<br>
Fernando<br>
</p>
<br>
<div class="moz-cite-prefix">On 24/07/2017 09:47, FERNANDO FREDIANI
wrote:<br>
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<blockquote type="cite"
cite="mid:773f24f6-bd1e-fe35-4ed4-155e92b4a467@upx.com">
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<p>Not tried this yet Edwardh, but will do at next time it
happens. THe source mac address should be the mac as the VM. I
don't see any reason for it to change from within the VM ou
outside.</p>
<p>What type of things would make the bridge stop learning a given
VM mac address ?</p>
<p>Fernando<br>
</p>
<br>
<div class="moz-cite-prefix">On 23/07/2017 07:51, Edward Haas
wrote:<br>
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<blockquote type="cite"
cite="mid:CALmkdFSQAshds0_jMe-PO64XTd7tMDPa0-A1wKdxu061hAOAsQ@mail.gmail.com">
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<div>Have you tried to use tcpdump at the VM vNIC to examine
if there is traffic trying to get out from there? And with
what source mac address?<br>
<br>
</div>
Thanks,<br>
</div>
Edy,<br>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Fri, Jul 21, 2017 at 5:36 PM,
FERNANDO FREDIANI <span dir="ltr"><<a
href="mailto:fernando.frediani@upx.com" target="_blank"
moz-do-not-send="true">fernando.frediani@upx.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Has
anyone had problem when using the ovirtmgmt bridge to
connect VMs ?<br>
<br>
I am still facing a bizarre problem where some VMs
connected to this bridge stop passing traffic. Checking
the problem further I see its mac address stops being
learned by the bridge and the problem is resolved only
with a VM reboot.<br>
<br>
When I last saw the problem I run brctl showmacs ovirtmgmt
and it shows me the VM's mac adress with agening timer
200.19. After the VM reboot I see the same mac with
agening timer 0.00.<br>
I don't see it in another environment where the ovirtmgmt
is not used for VMs.<br>
<br>
Does anyone have any clue about this type of behavior ?<br>
<br>
Fernando<br>
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</blockquote>
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<br>
</div>
</blockquote>
<br>
</blockquote>
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