4:20 p.m.
This is a multi-part message in MIME format.
--------------8C7156FA06BCE941A49120DE
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
Hello Edward, this happened again today and I was able to check more
details.
So:
- The VM stopped passing any network traffic.
- Checking 'brctl showmacs ovirtmgmt' it showed the VM's mac address
missing.
- 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.
- Another 'brctl showmacs ovirtmgmt' showed the VM's mac address learned
again by the bridge.
This Node server has the particularity of sharing the ovirtmgmt with
VMs. Could it possibly be the cause of the issue in any way ?
Thanks
Fernando
On 24/07/2017 09:47, FERNANDO FREDIANI wrote:
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.
What type of things would make the bridge stop learning a given VM mac
address ?
Fernando
On 23/07/2017 07:51, Edward Haas wrote:
> 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?
>
> Thanks,
> Edy,
>
> On Fri, Jul 21, 2017 at 5:36 PM, FERNANDO FREDIANI
> <fernando.frediani(a)upx.com <mailto:fernando.frediani@upx.com>> wrote:
>
> Has anyone had problem when using the ovirtmgmt bridge to connect
> VMs ?
>
> 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.
>
> 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.
> I don't see it in another environment where the ovirtmgmt is not
> used for VMs.
>
> Does anyone have any clue about this type of behavior ?
>
> Fernando
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org <mailto:Users@ovirt.org>
> http://lists.ovirt.org/mailman/listinfo/users
> <http://lists.ovirt.org/mailman/listinfo/users>
>
>
--------------8C7156FA06BCE941A49120DE
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: 7bit
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=utf-8">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<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>
</div>
<blockquote type="cite"
cite="mid:773f24f6-bd1e-fe35-4ed4-155e92b4a467@upx.com">
<meta http-equiv="Content-Type" content="text/html;
charset=utf-8">
<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>
</div>
<blockquote type="cite"
cite="mid:CALmkdFSQAshds0_jMe-PO64XTd7tMDPa0-A1wKdxu061hAOAsQ@mail.gmail.com">
<div dir="ltr">
<div>
<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(a)upx.com</a>&gt;</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>
______________________________<wbr>_________________<br>
Users mailing list<br>
<a href="mailto:Users@ovirt.org" target="_blank"
moz-do-not-send="true">Users(a)ovirt.org</a><br>
<a href="http://lists.ovirt.org/mailman/listinfo/users"
rel="noreferrer" target="_blank"
moz-do-not-send="true">http://lists.ovirt.org/mailman<wbr...
</blockquote>
</div>
<br>
</div>
</blockquote>
<br>
</blockquote>
<br>
</body>
</html>
--------------8C7156FA06BCE941A49120DE--