<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jul 25, 2017 at 12:20 AM, FERNANDO FREDIANI <span dir="ltr"><<a href="mailto:fernando.frediani@upx.com" target="_blank">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">
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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></div></blockquote><div>There is nothing special with ovirtmgmt bridge in this regard.<br></div><div>I suggest you check the VM itself to see if it tries to send traffic, the fact that the mac is not appearing on the bridge table is an outcome of no traffic passing from the vNIC with that source mac address.<br></div><div><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div bgcolor="#FFFFFF" text="#000000">
<p>Thanks<span class="HOEnZb"><font color="#888888"><br>
Fernando<br>
</font></span></p><div><div class="h5">
<br>
<div class="m_-7080011712010826830moz-cite-prefix">On 24/07/2017 09:47, FERNANDO FREDIANI
wrote:<br>
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<blockquote type="cite">
<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="m_-7080011712010826830moz-cite-prefix">On 23/07/2017 07:51, Edward Haas
wrote:<br>
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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">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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